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PatchSiren cyber security CVE debrief

CVE-2024-29988 Microsoft CVE debrief

CVE-2024-29988 is a Microsoft SmartScreen Prompt security feature bypass vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2024-04-30. Because it is a KEV-listed issue, defenders should treat it as actively exploited or otherwise high-priority for remediation, even though the supplied corpus does not include deeper technical details or impact scope.

Vendor
Microsoft
Product
SmartScreen Prompt
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2024-04-30
Original CVE updated
2024-04-30
Advisory published
2024-04-30
Advisory updated
2024-04-30

Who should care

Security and endpoint teams managing Windows environments, especially anyone relying on Microsoft SmartScreen Prompt as part of phishing, download, or application trust controls. Incident response, vulnerability management, and patch compliance teams should prioritize it because CISA lists it as known exploited.

Technical summary

The supplied source corpus identifies CVE-2024-29988 only as a Microsoft SmartScreen Prompt security feature bypass. No exploit mechanics, affected versions, or attack preconditions are included in the corpus provided here. The key operational signal is its inclusion in CISA’s Known Exploited Vulnerabilities catalog, which indicates defenders should prioritize mitigation and remediation using Microsoft’s guidance.

Defensive priority

High. KEV inclusion makes this a near-term remediation item. Follow CISA’s required action and Microsoft’s vendor guidance promptly, and verify exposure across managed Windows endpoints and any environments where SmartScreen Prompt is relied upon for user safety decisions.

Recommended defensive actions

  • Check Microsoft’s advisory for CVE-2024-29988 and apply any available security updates or mitigations.
  • Confirm whether Windows endpoints in your fleet depend on SmartScreen Prompt protections and prioritize those systems for remediation.
  • Use the CISA KEV due date (2024-05-21) as the latest acceptable internal remediation target, or faster if your risk policy requires it.
  • Validate patch compliance and document any systems that cannot be updated, then apply compensating controls per vendor instructions.
  • Monitor endpoint telemetry and security alerts for signs of suspicious download, execution, or browser-to-file trust bypass activity.

Evidence notes

This debrief is limited to the supplied corpus: the CISA KEV metadata, the CVE title/description, and the referenced official links. The corpus confirms the CVE identifier, vendor/product naming, publication date, KEV listing date, due date, and that CISA classifies the issue as a security feature bypass. No additional exploitation details were used.

Official resources

CVE-2024-29988 was published on 2024-04-30 and was added to CISA’s Known Exploited Vulnerabilities catalog the same day, with a remediation due date of 2024-05-21. No exploit details were included in the supplied corpus.