CVE-2015-2546 Microsoft CVE debrief

Who should care

Vulnerability management, endpoint operations, and security teams responsible for Microsoft patching should treat this as a priority remediation item, especially where Win32k-related updates are in scope.

Technical summary

The provided source corpus identifies the issue as a memory corruption vulnerability in Microsoft Win32k. CISA’s KEV metadata classifies it as known exploited, adds known ransomware campaign use, and points defenders to vendor-directed updates. No CVSS score, affected-version list, or exploit details were included in the supplied material.

Defensive priority

Urgent. CISA placed this issue in the KEV catalog and set a remediation due date of 2022-04-05, so it should be tracked and remediated ahead of routine patch queues.

Recommended defensive actions

• Confirm whether Microsoft guidance or updates apply to your environment for Win32k-related remediation.
• Prioritize deployment to the most exposed and business-critical systems first.
• Validate completion against the CISA KEV due date and document any exceptions.
• If immediate patching is not possible, apply temporary compensating controls and increase monitoring for suspicious activity.
• Review the official CVE, NVD, and CISA KEV references for any updated vendor or coordination guidance.

Evidence notes

All substantive statements are drawn from the supplied CISA KEV source item and the official reference links. The source metadata explicitly states: vendorProject Microsoft, product Win32k, vulnerabilityName Microsoft Win32k Memory Corruption Vulnerability, dateAdded 2022-03-15, dueDate 2022-04-05, knownRansomwareCampaignUse Known, and requiredAction: Apply updates per vendor instructions.

Official resources