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CVE-2016-3298 Microsoft CVE debrief

CVE-2016-3298 is a Microsoft Internet Explorer Messaging API information disclosure vulnerability that CISA has listed in its Known Exploited Vulnerabilities catalog. The KEV record assigns a remediation due date of 2022-06-14 and directs organizations to apply vendor updates. Because the supplied source set does not include exploit details, the safest takeaway is to treat this as a confirmed, publicly tracked exposure that warrants prompt patch management on any affected legacy Internet Explorer deployments.

Vendor
Microsoft
Product
Internet Explorer
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 teams responsible for Microsoft Internet Explorer installations, legacy Windows endpoints, and environments that still depend on IE-based workflows or embedded browser components should prioritize this CVE. It is especially important for defenders tracking CISA KEV items and for organizations with formal patch deadlines tied to known exploited vulnerabilities.

Technical summary

The available official record identifies the issue as a Microsoft Internet Explorer Messaging API information disclosure vulnerability. The corpus does not provide deeper technical mechanics, affected versions, or exploitation chain details. What is clearly established is that CISA categorizes it as a known exploited vulnerability and recommends applying updates per vendor instructions.

Defensive priority

High. CISA KEV inclusion indicates this vulnerability has been observed as actively exploited or otherwise meets CISA’s known-exploitation criteria, so remediation should be treated as time-sensitive.

Recommended defensive actions

  • Apply Microsoft updates or mitigations per vendor instructions as soon as possible.
  • Confirm whether any systems still rely on Internet Explorer or IE-hosted components and prioritize those assets for remediation.
  • Track this CVE as a KEV item and ensure internal patch deadlines are at or ahead of the CISA due date of 2022-06-14.
  • Validate exposure across endpoints, virtual desktops, and legacy application stacks that may still invoke IE.
  • If immediate patching is not possible, apply compensating controls that reduce access to affected systems until updates are deployed.

Evidence notes

Evidence is limited to the supplied official records and metadata. The CVE record and NVD link identify CVE-2016-3298, while the CISA KEV entry marks it as a known exploited vulnerability with dateAdded 2022-05-24, dueDate 2022-06-14, and requiredAction 'Apply updates per vendor instructions.' No additional exploit or version details were provided in the corpus.

Official resources

CISA KEV listed the vulnerability on 2022-05-24 with a remediation due date of 2022-06-14. The feed marks knownRansomwareCampaignUse as Unknown.