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

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.

Why this severity: CVSS 7.8 (CNA, v3.1); actively exploited (CISA KEV); known ransomware use

Started

Mar 11, 2025

Closed

Mar 11, 2025

CVEs

CVE-2025-24983CVE-2025-24984CVE-2025-24985CVE-2025-24991CVE-2025-24993CVE-2025-26633

• Microsoft
• Windows
• Ransomware
• CISA KEV

Notes & 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).