CVE-2015-2546

CVE-2015-2546 is a high-severity (CVSS 8.2) vulnerability in Microsoft Win32k. CISA added it to the Known Exploited Vulnerabilities catalog on March 15, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 5, 2022. CISA also lists it as known to be used in ransomware campaigns, so it should be prioritised accordingly. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

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.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

• http://www.securityfocus.com/bid/76608
• http://www.securitytracker.com/id/1033485
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-097
• http://www.securityfocus.com/bid/76608
• http://www.securitytracker.com/id/1033485
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-097
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-2546