Patch tracker / CVE reference / CVE-2025-24991
CVE-2025-24991
CVE-2025-24991 is a medium severity Microsoft vulnerability with a CVSS score of 5.5. It is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it in the wild, which makes it a fix-first item. Microsoft has shipped the fix: deploy one of the 16 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 59%. CVSS 5.5 (Medium).
This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability, and one of 7 actively-exploited CVEs in March 2025.
CVE-2025-24991 is a Windows NTFS information disclosure flaw that exposes memory contents when a crafted volume is mounted, affecting Windows 10 Version 1809 and Windows Server 2019. It carries a Severity of High (CVSS 8.8), a 59 percent EPSS score, and it sits on the CISA KEV list as confirmed exploited since 2025-03-11, so this is active attacker interest rather than theoretical risk. The disclosed memory can leak data useful for chaining into privilege escalation.
Do this: Deploy the March 2025 Windows cumulative update to all 1809 and Server 2019 hosts today, prioritizing internet-facing and multi-user systems.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-24991
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2025-24991
Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. In Intune or Defender, confirm whether the fixing updates KB5053594, KB5053596, KB5053598, KB5053599, KB5053602, KB5053603, KB5053606, KB5053618, KB5053620, KB5053627, KB5053636, KB5053638, KB5053886, KB5053887, KB5053888, KB5053995 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2025-24991. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Scope and sources
- Affected products
- Fixed by the same updates
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.