Actively exploited · Published Sep 9, 2015 · Assigned by microsoft

CVE-2015-2546

High 8.2 Exploited Ransomware

In plain English

A high-severity memory corruption in Win32k from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on March 15, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 10.1% (higher than 96% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.

Severity (CVSS 3.1)8.2High

Exploit odds (30 days)10.1%top 4.3% of all CVEs

Exploited in the wildYesCISA KEV since Mar 15, 2022

Attack tooling1Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Apr 5, 2022.

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

Weakness: CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References

1033485 vdb-entry, x_refsource_SECTRACK
MS15-097 vendor-advisory, x_refsource_MS
76608 vdb-entry, x_refsource_BID
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-2546 government-resource