# Microsoft Windows: 6 exploited vulnerabilities (CVE-2025-24983, CVE-2025-24984, CVE-2025-24985, CVE-2025-24991, CVE-2025-24993, CVE-2025-26633) · pwn.watch

> 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.

Page: https://pwn.watch/i/microsoft-windows-cve-2025-24983 · generated 2026-10-23T01:56:39.502Z

## Status
- Severity: critical · status: closed · patch: patched
- Product: Microsoft Windows
- Started: 2025-03-11 · closed: 2025-03-11
- CVEs: CVE-2025-24983, CVE-2025-24984, CVE-2025-24985, CVE-2025-24991, CVE-2025-24993, CVE-2025-26633
- Affected: See vendor advisory / CISA notes (versions not always listed in KEV feed)
- Fixed in: See vendor advisory linked in sources

## Follow this incident
- RSS (one item per update): https://pwn.watch/i/microsoft-windows-cve-2025-24983/feed.xml
- JSON Feed: https://pwn.watch/i/microsoft-windows-cve-2025-24983/feed.json
- Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/microsoft-windows-cve-2025-24983.json
- This file: https://pwn.watch/i/microsoft-windows-cve-2025-24983/llms.txt

## Updates (newest first)
- 2025-03-11: CISA added CVE-2025-24983 to the KEV catalog (due 2025-04-01).
- 2025-03-11: CISA added CVE-2025-24984 to the KEV catalog (due 2025-04-01).
- 2025-03-11: CISA added CVE-2025-24985 to the KEV catalog (due 2025-04-01).
- 2025-03-11: CISA added CVE-2025-24991 to the KEV catalog (due 2025-04-01).
- 2025-03-11: CISA added CVE-2025-24993 to the KEV catalog (due 2025-04-01).
- 2025-03-11: CISA added CVE-2025-26633 to the KEV catalog (due 2025-04-01).

## Fix brief
# Security brief: Microsoft Windows: 6 exploited vulnerabilities (CVE-2025-24983, CVE-2025-24984, CVE-2025-24985, CVE-2025-24991, CVE-2025-24993, CVE-2025-26633)

Source: https://pwn.watch/i/microsoft-windows-cve-2025-24983 · status: closed (closed Mar 11, 2025) · severity: critical · updated Mar 11, 2025

## Patch status
**PATCHED: fixed releases exist. Upgrade to a fixed version.**

## What it is
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.

Severity detail: CVSS 7.8 (CNA, v3.1); actively exploited (CISA KEV); known ransomware use

- Product: Microsoft Windows
- CVE / advisory ids: CVE-2025-24983, CVE-2025-24984, CVE-2025-24985, CVE-2025-24991, CVE-2025-24993, CVE-2025-26633

## Affected versions
- See vendor advisory / CISA notes (versions not always listed in KEV feed)

## Check whether you're affected
No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above.

## Fix
Upgrade to one of these fixed versions (or later on the same branch):
- See vendor advisory linked in sources

After upgrading, re-run the checks above and redeploy/restart the affected services.

## Latest updates
- Mar 11, 2025: CISA added CVE-2025-24983 to the KEV catalog (due 2025-04-01).
- Mar 11, 2025: CISA added CVE-2025-24984 to the KEV catalog (due 2025-04-01).
- Mar 11, 2025: CISA added CVE-2025-24985 to the KEV catalog (due 2025-04-01).
- Mar 11, 2025: CISA added CVE-2025-24991 to the KEV catalog (due 2025-04-01).
- Mar 11, 2025: CISA added CVE-2025-24993 to the KEV catalog (due 2025-04-01).
- Mar 11, 2025: CISA added CVE-2025-26633 to the KEV catalog (due 2025-04-01).

## Advisories
- [Microsoft advisory: Microsoft Windows](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24983) (Microsoft)
- [Microsoft advisory: Microsoft Windows](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24984) (Microsoft)
- [Microsoft advisory: Microsoft Windows](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24985) (Microsoft)
- [Microsoft advisory: Microsoft Windows](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24991) (Microsoft)
- [Microsoft advisory: Microsoft Windows](https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24993) (Microsoft)
- [NVD: CVE-2025-24983](https://nvd.nist.gov/vuln/detail/CVE-2025-24983) (NVD)
- [NVD: CVE-2025-24984](https://nvd.nist.gov/vuln/detail/CVE-2025-24984) (NVD)
- [NVD: CVE-2025-24985](https://nvd.nist.gov/vuln/detail/CVE-2025-24985) (NVD)
- [NVD: CVE-2025-24991](https://nvd.nist.gov/vuln/detail/CVE-2025-24991) (NVD)
- [NVD: CVE-2025-24993](https://nvd.nist.gov/vuln/detail/CVE-2025-24993) (NVD)
- [NVD: CVE-2025-26633](https://nvd.nist.gov/vuln/detail/CVE-2025-26633) (NVD)
- [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA)

## Caveats
Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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Machine-readable: https://pwn.watch/i/microsoft-windows-cve-2025-24983.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.