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CVE-2015-2419 Microsoft CVE debrief

CVE-2015-2419 is a Microsoft Internet Explorer memory corruption vulnerability that CISA has placed in its Known Exploited Vulnerabilities catalog, which means it was significant enough to warrant active defensive attention. In the supplied timeline, CISA added it on 2022-03-28 and set a remediation due date of 2022-04-18. For defenders, the practical takeaway is simple: treat this as a high-priority patch-and-mitigation item for any environment that still has Internet Explorer present or depends on IE-related legacy workflows. The source corpus does not provide exploit mechanics or affected build specifics, so remediation should follow vendor guidance and internal asset validation rather than assumptions.

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, endpoint, and patch-management teams responsible for Windows fleets where Internet Explorer or IE-dependent legacy applications may still be present. Organizations with internet-facing or broadly deployed user endpoints should treat this as especially urgent because CISA has identified it as known exploited.

Technical summary

The source corpus identifies CVE-2015-2419 as a Microsoft Internet Explorer memory corruption vulnerability and confirms its inclusion in CISA's Known Exploited Vulnerabilities catalog. That designation indicates known exploitation risk and justifies accelerated remediation. No further technical detail about the trigger, impact path, or affected versions is provided in the supplied sources, so defensive handling should rely on official vendor and catalog guidance.

Defensive priority

High. CISA KEV listing elevates this from routine vulnerability management to urgent remediation. Use the KEV due date as a prioritization benchmark and validate whether any legacy IE dependencies remain in scope.

Recommended defensive actions

  • Apply Microsoft updates or mitigations according to vendor instructions as soon as possible.
  • Inventory endpoints and servers for any remaining Internet Explorer exposure or IE-dependent applications.
  • Prioritize remediation on internet-facing systems and broadly deployed user endpoints first.
  • Verify patch status against the KEV due date and document exceptions for any systems that cannot be updated immediately.
  • Where feasible, reduce or eliminate legacy IE usage to shrink attack surface and future exposure.

Evidence notes

The supplied source corpus is limited to CISA KEV metadata and official record links. The source item explicitly names Microsoft Internet Explorer, describes the issue as a memory corruption vulnerability, marks it as known exploited, and provides the date added (2022-03-28), due date (2022-04-18), and required action: apply updates per vendor instructions. The corpus also references the official NVD detail page, but no additional exploit or impact details were used.

Official resources

Public defensive debrief based only on the supplied CISA KEV metadata and official reference links. No exploit instructions, reproduction steps, or unsupported technical claims are included.