Security incidents tagged Windows. Newest first.
A command-injection flaw in the OpenCode AI coding agent let a malicious or later-hijacked remote MCP server run PowerShell commands on a developer's Windows or WSL machine when they started the MCP OAuth sign-in. The server-supplied authorization endpoint was passed unescaped to an old version of the open package. Anomaly fixed it in 1.18.33 on Sep 28 without a CVE or advisory, so scanners won't flag 1.0.137 through 1.18.32. macOS and Linux are not affected. Pillar Security found it and rates it 9.8; no in-the-wild exploitation reported.
OpenCode AI coding agent (Anomaly) on Windows and WSLSince Oct 19, 2026
Microsoft’s October 13 2026 Patch Tuesday fixed an actively exploited Windows Shell security-feature bypass, CVE-2026-96951, that can evade Mark of the Web protections (command-injection style neutralization flaw). CISA added it to KEV. Two other publicly disclosed zero-days (.NET Framework WDAC bypass CVE-2026-108398 and MessagePack-CSharp DoS CVE-2026-92707) shipped in the same release.
Microsoft Windows Shell (and related Oct Patch Tuesday components)Closed Oct 13, 2026
Microsoft Windows Patched
Microsoft Windows Update Stack contains a link following vulnerability that allows a local attacker to escalate privileges locally up to SYSTEM. CISA added CVE-2026-81963, CVE-2026-85880 to the Known Exploited Vulnerabilities catalog on 2026-09-08 based on evidence of active exploitation.
Microsoft Windows Ancillary Function Driver for WinSock Patched
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. Added to CISA KEV on 2026-08-11.
Microsoft Windows Patched
Microsoft Windows Shell contains a protection mechanism failure vulnerability that allows an unauthorized attacker to perform spoofing over a network. Added to CISA KEV on 2026-04-28.
Microsoft Windows Patched
Microsoft Windows contains a link following vulnerability that allows for privilege escalation CISA added CVE-2025-60710, CVE-2023-36424 to the Known Exploited Vulnerabilities catalog on 2026-04-13 based on evidence of active exploitation.
Microsoft Windows Patched
Microsoft MSHTML Framework contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network. CISA added CVE-2026-21513, CVE-2026-21525, CVE-2026-21510, CVE-2026-21533, CVE-2026-21519 to the Known Exploited Vulnerabilities catalog on 2026-02-10 based on evidence of active exploitation.
React Native Community CLI Patched
React Native Community CLI contains an OS command injection vulnerability which could allow unauthenticated network attackers to send POST requests to the Metro Development Server and run arbitrary executables via a vulnerable endpoint exposed by the server. On Windows, attackers can also execute arbitrary shell commands with fully controlled arguments. Added to CISA KEV on 2026-02-05.
Microsoft Windows Patched
Microsoft Windows Desktop Windows Manager contains an information disclosure vulnerability that allows an authorized attacker to disclose information locally. Added to CISA KEV on 2026-01-13.
Microsoft Windows Patched
Microsoft Windows Cloud Files Mini Filter Driver contains a use after free vulnerability that can allow an authorized attacker to elevate privileges locally. Added to CISA KEV on 2025-12-09.
Microsoft Windows Patched
Microsoft Windows Kernel contains a race condition vulnerability that allows a local attacker with low-level privileges to escalate privileges. Successful exploitation of this vulnerability could enable the attacker to gain SYSTEM-level access. Added to CISA KEV on 2025-11-12.
Microsoft Windows Patched
Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution. Added to CISA KEV on 2025-10-24.
Microsoft Windows Patched
Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation. An attacker could execute a specially crafted malicious script to coerce the victim machine to connect back to the attack system using SMB and authenticate. Added to CISA KEV on 2025-10-20.
Microsoft Windows Patched
CVE-2025-24990: Microsoft Windows Agere Modem Driver contains an untrusted pointer dereference vulnerability that allows for privilege escalation. An attacker who successfully exploited this vulnerability could gain administrator privileges. CVE-2025-59230: Microsoft Windows contains an improper access control vulnerability in Windows Remote Access Connection Manager which could allow an authorized attacker to elevate privileges locally. Added to CISA KEV on 2025-10-14.
Microsoft Windows Patched
CVE-2011-3402: Microsoft Windows Kernel contains an unspecified vulnerability in the TrueType font parsing engine in win32k.sys in the kernel-mode drivers that allows remote attackers to execute arbitrary code via crafted font data in a Word document or web page. CVE-2013-3918: Microsoft Windows contains an out-of-bounds write vulnerability in the InformationCardSigninHelper Class ActiveX control, icardie.dll. An attacker could exploit the vulnerability by constructing a specially crafted webpage. When a user views the webpage, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization. CVE-2021-43226: Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms. Added to CISA KEV on 2025-10-06.
Citrix Session Recording Patched
CVE-2024-8068: Citrix Session Recording contains an improper privilege management vulnerability that could allow for privilege escalation to NetworkService Account access. An attacker must be an authenticated user in the same Windows Active Directory domain as the session recording server domain. CVE-2024-8069: Citrix Session Recording contains a deserialization of untrusted data vulnerability that allows limited remote code execution with privilege of a NetworkService Account access. Attacker must be an authenticated user on the same intranet as the session recording server. Added to CISA KEV on 2025-08-25.
RARLAB WinRAR Patched
RARLAB WinRAR contains a path traversal vulnerability affecting the Windows version of WinRAR. This vulnerability could allow an attacker to execute arbitrary code by crafting malicious archive files. Added to CISA KEV on 2025-08-12.
npm: eslint-config-prettier, eslint-plugin-prettier, synckit, @pkgr/core, napi-postinstall, is Patched
A maintainer was phished through the typosquat domain npnjs.com. The attacker published malicious eslint-config-prettier versions whose install script ran node-gyp.dll on Windows, dropping the Scavenger infostealer. eslint-plugin-prettier, synckit, @pkgr/core, napi-postinstall and later the 'is' package were also hit.
Microsoft Windows Patched
Microsoft Windows contains an external control of file name or path vulnerability that could allow an attacker to execute code from a remote WebDAV location specified by the WorkingDirectory attribute of Internet Shortcut files. Added to CISA KEV on 2025-06-10.
Microsoft Windows Patched
CVE-2025-30397: Microsoft Windows Scripting Engine contains a type confusion vulnerability that allows an unauthorized attacker to execute code over a network via a specially crafted URL. CVE-2025-30400: Microsoft Windows DWM Core Library contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. CVE-2025-32701: Microsoft Windows Common Log File System (CLFS) Driver contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. CVE-2025-32706: Microsoft Windows Common Log File System (CLFS) Driver contains a heap-based buffer overflow vulnerability that allows an authorized attacker to elevate privileges locally. CVE-2025-32709: Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to escalate privileges to administrator. Added to CISA KEV on 2025-05-13.
Microsoft Windows Patched
Microsoft Windows NTLM contains an external control of file name or path vulnerability that allows an unauthorized attacker to perform spoofing over a network. Added to CISA KEV on 2025-04-17.
Microsoft Windows Patched
Microsoft Windows Common Log File System (CLFS) Driver contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. Added to CISA KEV on 2025-04-08.
Microsoft Windows Patched
CVE-2025-24983: Microsoft Windows Win32 Kernel Subsystem contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. CVE-2025-24984: Microsoft Windows New Technology File System (NTFS) contains an insertion of sensitive Information into log file vulnerability that allows an unauthorized attacker to disclose information with a physical attack. An attacker who successfully exploited this vulnerability could potentially read portions of heap memory. CVE-2025-24985: Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally. CVE-2025-24991: Microsoft Windows New Technology File System (NTFS) contains an out-of-bounds read vulnerability that allows an authorized attacker to disclose information locally. CVE-2025-24993: Microsoft Windows New Technology File System (NTFS) contains a heap-based buffer overflow vulnerability that allows an unauthorized attacker to execute code locally. CVE-2025-26633: Microsoft Windows Management Console (MMC) contains an improper neutralization vulnerability that allows an unauthorized attacker to bypass a security feature locally. Added to CISA KEV on 2025-03-11.
Microsoft Windows Patched
Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. Added to CISA KEV on 2025-03-03.
Microsoft Windows Patched
CVE-2025-21391: Microsoft Windows Storage contains a link following vulnerability that could allow for privilege escalation. This vulnerability could allow an attacker to delete data including data that results in the service being unavailable. CVE-2025-21418: Microsoft Windows Ancillary Function Driver for WinSock contains a heap-based buffer overflow vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges. Added to CISA KEV on 2025-02-11.
Microsoft Windows Patched
CVE-2025-21333: Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow vulnerability that allows a local attacker to gain SYSTEM privileges. CVE-2025-21334: Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges. CVE-2025-21335: Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges. Added to CISA KEV on 2025-01-14.
Microsoft Windows Patched
Microsoft Windows Common Log File System (CLFS) driver contains a heap-based buffer overflow vulnerability that allows a local attacker to escalate privileges. Added to the CISA KEV catalog on 2024-12-10.
Microsoft Windows Patched
CVE-2024-43451: Microsoft Windows contains an NTLMv2 hash spoofing vulnerability that could result in disclosing a user's NTLMv2 hash to an attacker via a file open operation. The attacker could then leverage this hash to impersonate that user. CVE-2024-49039: Microsoft Windows Task Scheduler contains a privilege escalation vulnerability that can allow an attacker-provided, local application to escalate privileges outside of its AppContainer, and access privileged RPC functions. Added to the CISA KEV catalog on 2024-11-12. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
CVE-2024-43572: Microsoft Windows Management Console contains unspecified vulnerability that allows for remote code execution. CVE-2024-43573: Microsoft Windows MSHTML Platform contains an unspecified spoofing vulnerability which can lead to a loss of confidentiality. Added to the CISA KEV catalog on 2024-10-08.
Microsoft Windows Patched
Microsoft Windows MSHTML Platform contains a user interface (UI) misrepresentation of critical information vulnerability that allows an attacker to spoof a web page. This vulnerability was exploited in conjunction with CVE-2024-38112. Added to the CISA KEV catalog on 2024-09-16.
Microsoft Publisher, Windows Patched
CVE-2024-38014: Microsoft Windows Installer contains an improper privilege management vulnerability that could allow an attacker to gain SYSTEM privileges. CVE-2024-38217: Microsoft Windows Mark of the Web (MOTW) contains a protection mechanism failure vulnerability that allows an attacker to bypass MOTW-based defenses. This can result in a limited loss of integrity and availability of security features such as Protected View in Microsoft Office, which rely on MOTW tagging. CVE-2024-38226: Microsoft Publisher contains a protection mechanism failure vulnerability that allows attacker to bypass Office macro policies used to block untrusted or malicious files. Added to the CISA KEV catalog on 2024-09-10.
Kingsoft WPS Office Patched
Kingsoft WPS Office contains a path traversal vulnerability in promecefpluginhost.exe on Windows that allows an attacker to load an arbitrary Windows library. Added to the CISA KEV catalog on 2024-09-03.
Microsoft Project, Windows Patched
CVE-2024-38106: Microsoft Windows Kernel contains an unspecified vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges. Successful exploitation of this vulnerability requires an attacker to win a race condition. CVE-2024-38107: Microsoft Windows Power Dependency Coordinator contains an unspecified vulnerability that allows for privilege escalation, enabling a local attacker to obtain SYSTEM privileges. CVE-2024-38178: Microsoft Windows Scripting Engine contains a memory corruption vulnerability that allows unauthenticated attacker to initiate remote code execution via a specially crafted URL. CVE-2024-38189: Microsoft Project contains an unspecified vulnerability that allows for remote code execution via a malicious file. CVE-2024-38193: Microsoft Windows Ancillary Function Driver for WinSock contains an unspecified vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges. CVE-2024-38213: Microsoft Windows SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the SmartScreen user experience via a malicious file. Added to the CISA KEV catalog on 2024-08-13.
Microsoft Windows Patched
Microsoft COM for Windows contains a deserialization of untrusted data vulnerability that allows for privilege escalation and remote code execution via a specially crafted file or script. Added to the CISA KEV catalog on 2024-08-05. CVE-2018-0824 was assigned before 2024; the KEV listing came in 2024.
A faulty CrowdStrike Falcon sensor configuration update (Channel File 291) caused a logic error that blue-screened Windows hosts running sensor 7.11 and later that were online between 04:09 and 05:27 UTC on 2024-07-19. Microsoft estimated 8.5 million Windows devices were affected CrowdStrike stressed it was not a cyberattack; it is tracked here because a security agent with kernel-level access took down machines worldwide.
CrowdStrike Falcon sensor for WindowsClosed Aug 6, 2024
Microsoft Windows Patched
CVE-2024-38080: Microsoft Windows Hyper-V contains a privilege escalation vulnerability that allows a local attacker with user permissions to gain SYSTEM privileges. CVE-2024-38112: Microsoft Windows MSHTML Platform contains a spoofing vulnerability that has a high impact to confidentiality, integrity, and availability. Added to the CISA KEV catalog on 2024-07-09.
Microsoft Windows Patched
Microsoft Windows Kernel contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability that could allow for privilege escalation. Added to the CISA KEV catalog on 2024-10-15. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows Kernel-Mode Driver contains an untrusted pointer dereference vulnerability that allows a local attacker to escalate privileges. Added to the CISA KEV catalog on 2024-12-16.
PHP Group PHP Patched
A bypass of the old CVE-2012-1823 fix: on Windows, PHP's 'Best-Fit' character mapping let attackers inject arguments into PHP running in CGI mode (including default XAMPP setups) and execute code remotely. Found by Orange Tsai (DEVCORE) and fixed in PHP 8.3.8, 8.2.20 and 8.1.29. Exploitation, including by ransomware operators, followed within days. Added to the CISA KEV catalog on 2024-06-12. CISA lists known use in ransomware campaigns.
Microsoft DWM Core Library, Windows Patched
CVE-2024-30040: Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass. CVE-2024-30051: Microsoft DWM Core Library contains a privilege escalation vulnerability that allows an attacker to gain SYSTEM privileges. Added to the CISA KEV catalog on 2024-05-14. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows Print Spooler service contains a privilege escalation vulnerability. An attacker may modify a JavaScript constraints file and execute it with SYSTEM-level permissions. Added to the CISA KEV catalog on 2024-04-23. CVE-2022-38028 was assigned before 2024; the KEV listing came in 2024.
Microsoft Windows Patched
Microsoft Windows Error Reporting Service contains an improper privilege management vulnerability that allows a local attacker with user permissions to gain SYSTEM privileges. Added to the CISA KEV catalog on 2024-06-13. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows Kernel contains an exposed IOCTL with insufficient access control vulnerability within the IOCTL (input and output control) dispatcher in appid.sys that allows a local attacker to achieve privilege escalation. Added to the CISA KEV catalog on 2024-03-04. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
CVE-2024-21351: Microsoft Windows SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the SmartScreen user experience and inject code to potentially gain code execution, which could lead to some data exposure, lack of system availability, or both. CVE-2024-21412: Microsoft Windows Internet Shortcut Files contains an unspecified vulnerability that allows for a security feature bypass. Added to the CISA KEV catalog on 2024-02-13. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows Mark of the Web (MOTW) contains a security feature bypass vulnerability resulting in a limited loss of integrity and availability of security features. Added to CISA KEV on 2023-11-16.
Microsoft Windows Patched
Microsoft Windows SmartScreen contains a security feature bypass vulnerability that could allow an attacker to bypass Windows Defender SmartScreen checks and their associated prompts. Microsoft Windows Desktop Window Manager (DWM) Core Library contains an unspecified vulnerability that allows for privilege escalation. Microsoft Windows Cloud Files Mini Filter Driver contains a privilege escalation vulnerability that could allow an attacker to gain SYSTEM privileges. Added to CISA KEV on 2023-11-14.
Microsoft Windows CNG Key Isolation Service Patched
Microsoft Windows Cryptographic Next Generation (CNG) Key Isolation Service contains an unspecified vulnerability that allows an attacker to gain specific limited SYSTEM privileges. Added to CISA KEV on 2023-10-04.
RARLAB WinRAR Patched
WinRAR before 6.23 would run hidden code when a user opened what looked like a harmless file inside a ZIP. Group-IB found it exploited since April 2023 to target traders. After the fix, Google TAG saw Russian and Chinese government-backed groups pile on.
Microsoft Windows Patched
Microsoft Windows Search contains an unspecified vulnerability that could allow an attacker to evade Mark of the Web (MOTW) defenses via a specially crafted malicious file, leading to remote code execution. Added to CISA KEV on 2023-07-17. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for privilege escalation. Microsoft Windows Defender SmartScreen contains a security feature bypass vulnerability that allows an attacker to bypass the Open File - Security Warning prompt. Microsoft Windows Error Reporting Service contains an unspecified vulnerability that allows for privilege escalation. Added to CISA KEV on 2023-07-11.
Microsoft Windows Patched
Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation. Added to CISA KEV on 2023-04-11. CISA lists known use in ransomware campaigns.
Signed 3CX DesktopApp builds for Windows and macOS shipped with embedded malicious code. Mandiant traced it to a North Korea-linked actor (UNC4736) who first got in through a trojanized X_TRADER install from Trading Technologies: a supply-chain attack caused by another supply-chain attack.
3CX DesktopApp (Electron)Closed Apr 20, 2023
Microsoft Windows Patched
Microsoft Windows SmartScreen contains a security feature bypass vulnerability that could allow an attacker to evade Mark of the Web (MOTW) defenses via a specially crafted malicious file. Added to CISA KEV on 2023-03-14. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows Graphic Component contains an unspecified vulnerability that allows for privilege escalation. Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation. Added to CISA KEV on 2023-02-14. CISA lists known use in ransomware campaigns.
Microsoft Windows Patched
Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation. Added to CISA KEV on 2023-01-10.
🚨 OpenCode flaw lets malicious MCP servers execute code on Windows and WSL when developers initiate sign-in. Fixed in v1.18.33, but there's no CVE or security advisory. Vulnerability scanners won't flag affected versions. What developers need to know: t.co/l6N4LCjhWt
🔴 Patch Windows right now. CVE-2026-96951 — a "Mark of the Web" bypass — is being actively exploited in the wild. A malicious ZIP or ISO can run code on your machine without triggering security warnings. Start → Settings → Windows Update → Check for updates. Don't postpone
Patch fast, stay safe. Attackers exploit known flaws within days, like this month's Windows Shell zero-day (CVE-2026-96951) and the Linux "PwnEscape" bug (CVE-2026-99999). Update Windows and Linux today, turn on auto-updates, and use MFA. #CyberSecurity #PatchManagement #InfoSec t.co/WYVnDmsENU
October Patch Tuesday: 1,408 CVEs, 72 critical. Zero-day CVE-2026-96951 (Windows Shell Mark of the Web bypass) is exploited, CISA deadline Oct 16. SharePoint CVE-2026-65660 is also exploited, yet Microsoft's guide still says No. #PatchTuesday #InfoSec
