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CVE-2008-4250 Microsoft CVE debrief

CVE-2008-4250 is a Microsoft Windows buffer overflow vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog, indicating active exploitation risk. The available source corpus does not provide version-level impact details, but the KEV listing alone makes this a high-priority issue for Windows administrators and security teams. CISA added the entry on 2026-05-20 and set a remediation due date of 2026-06-03.

Vendor
Microsoft
Product
Windows
CVSS
CRITICAL 9.8
CISA KEV
Listed
Original CVE published
2026-05-20
Original CVE updated
2026-05-20
Advisory published
2026-05-20
Advisory updated
2026-05-20

Who should care

Windows administrators, endpoint and server security teams, incident responders, vulnerability management owners, and any organization that still operates Microsoft Windows systems referenced by this KEV entry.

Technical summary

The source corpus identifies the issue as a Microsoft Windows buffer overflow vulnerability and classifies it as known exploited. No additional technical breakdown, affected build list, or attack path is provided in the supplied sources. Because it is in CISA’s KEV catalog, defenders should treat exposure as urgent even without further public detail in this corpus.

Defensive priority

Critical. Known exploitation and KEV inclusion require prompt triage, especially on any Windows systems that cannot be quickly validated, patched, or otherwise mitigated.

Recommended defensive actions

  • Inventory Microsoft Windows systems that may be affected and confirm exposure status.
  • Prioritize vendor-recommended mitigation and remediation steps for Windows systems.
  • If mitigation is unavailable, follow CISA’s guidance to discontinue use of the product or service where applicable.
  • Validate that security monitoring, endpoint detection, and incident response coverage is in place for Windows assets.
  • Track the KEV due date of 2026-06-03 and ensure remediation or compensating controls are completed before then.

Evidence notes

Supported facts come from CISA KEV metadata and the supplied official links to the CVE record and NVD entry. The source corpus identifies the vulnerability as a Microsoft Windows buffer overflow vulnerability, marks it as known exploited, and records CISA’s remediation guidance plus dates added and due. No additional exploit mechanics, affected versions, or remediation specifics were supplied.

Official resources

CISA added CVE-2008-4250 to the Known Exploited Vulnerabilities catalog on 2026-05-20 and set a remediation due date of 2026-06-03. The supplied corpus does not include vendor patch notes beyond the KEV reference to Microsoft instructions.