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CVE-2025-24993 Microsoft CVE debrief

CVE-2025-24993 is a Microsoft Windows NTFS heap-based buffer overflow vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2025-03-11. Because it is listed in KEV, organizations should treat it as actively exploited and prioritize mitigation and patching ahead of routine update cycles. CISA set a remediation due date of 2025-04-01.

Vendor
Microsoft
Product
Windows
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2025-03-11
Original CVE updated
2025-03-11
Advisory published
2025-03-11
Advisory updated
2025-03-11

Who should care

Windows administrators, endpoint and server security teams, vulnerability management teams, and incident responders should prioritize this issue, especially in environments where Windows systems expose NTFS-accessible attack surfaces or have broad user interaction.

Technical summary

The available source corpus identifies the issue as a heap-based buffer overflow in Microsoft Windows NTFS. No CVSS score or deeper exploit mechanics were provided in the supplied sources. The strongest evidence available is CISA's KEV listing, which indicates known exploitation and establishes a short remediation window.

Defensive priority

Urgent. CISA placed this vulnerability in the Known Exploited Vulnerabilities catalog on 2025-03-11 and set a due date of 2025-04-01, so it should be prioritized for immediate mitigation and patch deployment.

Recommended defensive actions

  • Review Microsoft guidance for CVE-2025-24993 and apply the vendor-recommended fix or mitigation as soon as possible.
  • Verify whether any Windows assets in your environment are affected and prioritize internet-facing or high-value systems first.
  • Track remediation against the CISA KEV due date of 2025-04-01 and escalate if patching is delayed.
  • If mitigations are unavailable for a specific environment, follow CISA's KEV guidance and consider compensating controls or discontinuing use where applicable.
  • Confirm exposure through inventory and vulnerability management tooling, then validate remediation after deployment.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the linked official resources. The source item metadata lists Microsoft as the vendor, Windows as the product, and names the issue 'Microsoft Windows NTFS Heap-Based Buffer Overflow Vulnerability.' Timeline context is taken from the supplied dates: publishedAt and modifiedAt are both 2025-03-11, and CISA's KEV dateAdded is also 2025-03-11 with a dueDate of 2025-04-01. No CVSS score was provided in the corpus.

Official resources

CISA added CVE-2025-24993 to the Known Exploited Vulnerabilities catalog on 2025-03-11, indicating known exploitation and a remediation due date of 2025-04-01.