Is CVE-2015-2546 being actively exploited?

Yes. CVE-2015-2546 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on March 15, 2022.

What is the CVSS score for CVE-2015-2546?

CVE-2015-2546 has a CVSS 3.1 base score of 8.2 (HIGH).

CVE-2015-2546

HIGH · CVSS 8.2CISA KEV: actively exploitedEPSS 10.1%EU EUVD: exploited

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.

Key facts

CVSS score: 8.2 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 10.1% (96th percentile)
In CISA KEV: Yes, added March 15, 2022
In EU EUVD: Yes (EUVD-2015-2639)
Published: September 9, 2015
NVD last modified: August 14, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Microsoft Win32k Memory Corruption Vulnerability

Added to the KEV catalog on March 15, 2022; federal remediation due April 5, 2022. Known to be used in ransomware campaigns.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2015-2639 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on August 14, 2026.

View on the EU Vulnerability Database

Affected products

microsoft / windows 10 1507
microsoft / windows 7
microsoft / windows 8
microsoft / windows 8.1
microsoft / windows rt
microsoft / windows rt 8.1
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2008
microsoft / windows server 2012
microsoft / windows server 2012
microsoft / windows vista

Certified products that may be affected

15 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Microsoft Windows 8 and Windows RT - Microsoft Corporation - Common Criteria CCEVS-VR-VID-10620-2015 - archived
Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical
Microsoft Windows Vista Kernel Mode Security Support Provider Interface (ksecdd.sys) - Microsoft Corporation - FIPS 140 1000 - historical
Microsoft Windows Vista Cryptographic Primitives Library (bcrypt.dll) - Microsoft Corporation - FIPS 140 1001 - historical

See all 15 in the Security Certifications Explorer.

References

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)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain