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CVE-2015-2546

Microsoft Win32k Memory Corruption

8.2 HIGHActively exploited (CISA KEV)Used in ransomwareEPSS 10.1%
  1. Published8 Sept 2015
  2. Added to CISA KEV15 Mar 2022
  3. Remediation due5 Apr 2022
Actively exploited (CISA KEV)

The kernel-mode driver in Microsoft Windows OS and Server allows local users to gain privileges via a crafted application.

Added to KEV: 15 Mar 2022Federal remediation due: 5 Apr 2022Used in ransomware

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1507all versions
Microsoft Windows 7all versions
Microsoft Windows 8all versions
Microsoft Windows 8.1all versions
Microsoft Windows Rtall versions
Microsoft Windows Rt 8.1all versions
Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Vistaall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2015-2546 being actively exploited?

Yes. CVE-2015-2546 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 15 Mar 2022. It has been used in ransomware campaigns.

How severe is CVE-2015-2546?

CVE-2015-2546 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 10.1% probability of exploitation.

Which products are affected by CVE-2015-2546?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 7, Microsoft Windows 8, Microsoft Windows 8.1, Microsoft Windows Rt, and 4 more.

How do I fix CVE-2015-2546?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2015-2546 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.