Security Digest · Vulnerability record · Known exploited
CVE-2025-24993: Microsoft Windows NTFS Heap-Based Buffer Overflow Vulnerability
Exploited in the wild (CISA KEV). Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
CISA KEV · added 2025-03-11 CVSS 7.8 High EPSS 2.2% · p82
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Microsoft Windows. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-03-11, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-04-01; treat that as the outer limit, not the target.
- EPSS 2.2%, percentile 82: FIRST’s model estimates a 2.2% chance of exploitation activity in the next 30 days, higher than 82% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
What it is
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
CISA’s summary
Microsoft Windows New Technology File System (NTFS) contains a heap-based buffer overflow vulnerability that allows an unauthorized attacker to execute code locally.
Weakness type: CWE-122.
Product: Microsoft Windows · Assigned by: microsoft · Published: 2025-03-11
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Microsoft | Windows 10 Version 1507 | 10.0.10240.0 < 10.0.10240.20947 |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 < 10.0.14393.7876 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 < 10.0.17763.7009 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 < 10.0.19044.5608 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 < 10.0.19045.5608 |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 < 10.0.22621.5039 |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 < 10.0.22631.5039 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 < 10.0.22631.5039 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 < 10.0.26100.3476 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 < 6.1.7601.27618 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoft | 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C |
- Attack vector: local access needed
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: required (a user must click/open something)
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-03-11; federal due date 2025-04-01. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 2.20% probability of exploitation activity in the next 30 days; percentile 82.
Timeline
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CVE record published by microsoft
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Windows NTFS Remote Code Execution Vulnerability msrc.microsoft.com
- Listed in CISA KEV notes (msrc.microsoft.com) msrc.microsoft.com
Vulnerability records
- CVE.org record CVE-2025-24993 cve.org
- NVD entry CVE-2025-24993 nvd.nist.gov
Government
All exploited Microsoft vulnerabilities · Today’s Security Digest