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PatchSiren cyber security CVE debrief

CVE-2025-24985 Microsoft CVE debrief

CVE-2025-24985 is a Microsoft Windows Fast FAT File System Driver integer overflow vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2025-03-11. Because it is in KEV, defenders should treat it as an active-risk issue and prioritize vendor guidance and mitigation planning rather than routine patch scheduling.

Vendor
Microsoft
Product
Windows
CVSS
HIGH 7.8
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 security teams, vulnerability management owners, and incident responders responsible for Microsoft Windows systems that use the Fast FAT file system driver.

Technical summary

The supplied corpus identifies the issue as an integer overflow in the Microsoft Windows Fast FAT File System Driver. No further technical details, affected versions, or exploitation mechanics are included in the provided source set. The only authoritative risk signal in the corpus is CISA KEV inclusion, which indicates known exploitation.

Defensive priority

Urgent. KEV inclusion means this should be prioritized ahead of non-KEV issues, with remediation tracked against the 2025-04-01 due date published by CISA.

Recommended defensive actions

  • Review Microsoft’s official guidance for CVE-2025-24985 and apply the vendor-recommended mitigation or update path.
  • Inventory Windows systems to confirm exposure to the Fast FAT file system driver and track remediation status centrally.
  • Prioritize remediation before the CISA KEV due date of 2025-04-01.
  • Use compensating controls where patching or mitigation is delayed, and document any exceptions.
  • Monitor Microsoft and CISA advisories for updates to affected scope or remediation instructions.

Evidence notes

This debrief is based only on the supplied CISA KEV metadata and official resource links. The corpus names the vulnerability, identifies Microsoft/Windows as the vendor/product, and confirms KEV listing with dateAdded 2025-03-11 and dueDate 2025-04-01. No CVSS score, affected version list, exploit details, or remediation text beyond the KEV-required action were provided in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-24985 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-24985

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-24985 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-24985

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.