CVEs / CVE-2015-2546

CVE-2015-2546: Microsoft Win32k Memory Corruption Vulnerability

Known exploited in the CISA KEV catalog since 15 Mar 2022
medium 6.9 CVSS 2.0 (NVD)
EPSS 10.1% chance of exploitation in the next 30 days, higher than 95% of CVEs (30 Oct 2026)
Last changed at its sources 14 Aug 2026

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Summary

The kernel-mode driver in Microsoft Windows OS and Server allows local users to gain privileges via a crafted application.
CISA, Known Exploited Vulnerabilities catalog

Description

The kernel-mode driver in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 allows local users to gain privileges via a crafted application, aka "Win32k Memory Corruption Elevation of Privilege Vulnerability," a different vulnerability than CVE-2015-2511, CVE-2015-2517, and CVE-2015-2518.
The CVE record, via NVD · published 9 Sep 2015 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a n/a	n/a	—

Exploitation

In CISA KEV since	15 Mar 2022
Due date for US federal agencies	5 Apr 2022
Used in ransomware campaigns	Known
Required action	Apply updates per vendor instructions.

Severity

CVSS 2.0	6.9 medium `AV:L/AC:M/Au:N/C:C/I:C/A:C` Scored by NVD
Weakness	CWE-119

References

CVE-2015-2546 on NVD
CVE-2015-2546 in the CISA KEV catalog
http://www.securityfocus.com/bid/76608 Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1033485 Broken Link, Third Party Advisory, VDB Entry
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-097 Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-2546 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.