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CVE-2013-2551 Microsoft CVE debrief

CVE-2013-2551 is a Microsoft Internet Explorer use-after-free vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. CISA added it on 2022-03-28 and set a 2022-04-18 remediation due date, noting known ransomware campaign use.

Vendor
Microsoft
Product
Internet Explorer
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-28
Original CVE updated
2022-03-28
Advisory published
2022-03-28
Advisory updated
2022-03-28

Who should care

Security teams managing Microsoft Internet Explorer exposure, especially on legacy Windows systems, should treat this as a priority because it is listed in CISA's KEV catalog as known exploited.

Technical summary

The official records identify CVE-2013-2551 as a use-after-free vulnerability in Microsoft Internet Explorer. The CISA KEV entry marks it as known exploited and records known ransomware campaign use; the supplied corpus does not include deeper technical detail or exploitation mechanics.

Defensive priority

High

Recommended defensive actions

  • Apply updates per vendor instructions.
  • Inventory systems that still use or expose Internet Explorer, including compatibility modes and legacy applications.
  • Prioritize patching or mitigation for internet-facing and high-value endpoints.
  • Validate remediation against the CISA KEV due date context and monitor for suspicious browser-related activity.

Evidence notes

Claims above are limited to the official CVE record, NVD detail page, and CISA KEV catalog entry supplied here. The corpus confirms the vulnerability name, vendor/product, KEV status, dateAdded, dueDate, and known ransomware campaign use, but not a full exploit narrative or impact statement.

Official resources

Publicly cataloged by CISA as a known exploited vulnerability; remediation guidance is to apply updates per vendor instructions.