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CVE-2013-7331 Microsoft CVE debrief

CVE-2013-7331 is a Microsoft Internet Explorer information disclosure vulnerability that CISA has listed in its Known Exploited Vulnerabilities catalog. That makes it a high-priority defensive item even though the supplied corpus does not include a CVSS score or deeper technical writeup. Organizations that still have Internet Explorer in use should treat this as a prompt to apply vendor updates and reduce exposure on any systems where IE remains enabled.

Vendor
Microsoft
Product
Internet Explorer
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-05-25
Original CVE updated
2022-05-25
Advisory published
2022-05-25
Advisory updated
2022-05-25

Who should care

Security teams, endpoint administrators, and Windows fleet owners should care, especially if any legacy systems still rely on Internet Explorer. Because CISA lists this CVE as known exploited, defenders should prioritize systems that can still launch IE, legacy line-of-business environments, and any host that has not yet been remediated according to vendor guidance.

Technical summary

The available official metadata identifies the issue as an Internet Explorer information disclosure vulnerability affecting Microsoft Internet Explorer. CISA’s KEV catalog marks it as known exploited and directs defenders to apply updates per vendor instructions. The corpus provided here does not include exploit mechanics, affected versions, or a CVSS rating, so the safest conclusion is operational: exposure through Internet Explorer should be reduced and vendor remediation applied where applicable.

Defensive priority

High. CISA has placed this CVE in the Known Exploited Vulnerabilities catalog, which indicates confirmed real-world abuse and a need for timely remediation.

Recommended defensive actions

  • Apply Microsoft updates and follow vendor instructions for Internet Explorer remediation.
  • Identify hosts where Internet Explorer is still enabled or reachable and prioritize those for patching.
  • Remove or disable Internet Explorer where business requirements no longer justify its use.
  • Verify remediation status across the Windows fleet, including legacy and hard-to-manage systems.
  • Track CISA KEV due dates and ensure this item is addressed before the listed deadline.

Evidence notes

This debrief is based only on the supplied CISA KEV metadata and official reference links. The source item identifies the vulnerability as 'Microsoft Internet Explorer Information Disclosure Vulnerability,' marks it as known exploited, and lists the required action as applying updates per vendor instructions. The timeline provided shows the KEV date added as 2022-05-25 and due date as 2022-06-15. No additional technical details, CVSS score, or exploit description were supplied.

Official resources

CISA included CVE-2013-7331 in the Known Exploited Vulnerabilities catalog on 2022-05-25 with a due date of 2022-06-15. The available official metadata does not provide exploit details, affected version ranges, or a CVSS score.