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PatchSiren cyber security CVE debrief

CVE-2016-3351 Microsoft CVE debrief

CVE-2016-3351 is an information disclosure vulnerability affecting Microsoft Internet Explorer and Edge. CISA includes it in the Known Exploited Vulnerabilities catalog, which means the issue has been observed in active exploitation and should be treated as a prioritized patching item. The supplied source data also marks known ransomware campaign use as "Known," further increasing urgency for defensive action.

Vendor
Microsoft
Product
Internet Explorer and Edge
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-05-24
Original CVE updated
2022-05-24
Advisory published
2022-05-24
Advisory updated
2022-05-24

Who should care

Security and IT teams responsible for Microsoft Internet Explorer and Edge deployments, endpoint patch management, vulnerability management, and incident response should prioritize this issue. Organizations that still rely on affected browser components should treat it as a high-priority remediation item.

Technical summary

The available source corpus identifies CVE-2016-3351 only as an information disclosure vulnerability in Microsoft Internet Explorer and Edge. The corpus does not include a deeper technical root cause, exploitation method, or affected version detail beyond the product and vulnerability class. CISA’s KEV entry confirms it as a known exploited vulnerability and notes known ransomware campaign use.

Defensive priority

High. CISA has placed this CVE in the Known Exploited Vulnerabilities catalog, which is a strong indicator that remediation should be prioritized over routine patch cycles.

Recommended defensive actions

  • Apply vendor updates per Microsoft guidance as soon as possible.
  • Use the CISA KEV catalog entry and vendor advisories to confirm affected versions and remediation status.
  • Prioritize exposed or internet-reachable systems and endpoints that still depend on Internet Explorer or Edge components.
  • Validate patch deployment through vulnerability scanning and asset inventory checks.
  • Monitor for signs of exploitation on endpoints that could have been exposed before remediation.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD references listed in the corpus. The source metadata states: vendor Microsoft, product Internet Explorer and Edge, vulnerability name "Microsoft Internet Explorer and Edge Information Disclosure Vulnerability," dateAdded 2022-05-24, dueDate 2022-06-14, and knownRansomwareCampaignUse "Known." No additional technical details were present in the supplied corpus.

Official resources

CISA’s KEV metadata lists this vulnerability as known exploited and indicates known ransomware campaign use. The supplied corpus does not provide a fuller exploitation narrative or technical root-cause description.