CVE-2025-24991
Published: March 11, 2025
Official Description
Microsoft Windows New Technology File System (NTFS) contains an out-of-bounds read vulnerability that allows an authorized attacker to disclose information locally.
CISA KEV Advisory
Microsoft Windows NTFS Out-Of-Bounds Read Vulnerability
Microsoft Windows New Technology File System (NTFS) contains an out-of-bounds read vulnerability that allows an authorized attacker to disclose information locally.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This vulnerability in Microsoft Windows New Technology File System (NTFS) allows an authorized local attacker to disclose sensitive information due to an out-of-bounds read. Its inclusion in CISA's KEV catalog and active exploitation in the wild highlight its importance, despite a low EPSS score indicating a lower overall exploitation probability across all internet-facing systems. This flaw could lead to unauthorized access to confidential data.
This vulnerability is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog. Exploitation requires local access and an authorized attacker.
Apply the latest security updates from Microsoft for Windows NTFS. Implement strong access controls and monitor for unusual activity on local systems.
Technical Analysis
CVE-2025-24991 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-24991 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-24991 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1