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

CVE-2015-2546 has a CVSS 3.1 base score of 8.2 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H. EPSS exploitation probability: 39.8%.

Is CVE-2015-2546 being actively exploited?

Yes, CVE-2015-2546 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

Is there a patch available for CVE-2015-2546?

Yes, a patch is available for CVE-2015-2546. Update the affected software to the latest version immediately.

Windows Vista CVE-2015-2546

HIGH

Buffer Overflow (CWE-119)

2015-09-09 secure@microsoft.com

Buffer Overflow Microsoft Windows 10 1507 Windows Server 2008 Windows Server 2012 Windows 7 Windows 8 1 Windows Rt 8 1 Windows Vista Windows 8 Windows Rt

8.2

CVSS 3.1 · Vendor: microsoft

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Vulnerability Assessment

Weakness	CWE CWE-119 ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 8.2 (HIGH). Attack characteristics: local attack vector, low complexity, low privileges required, user interaction required. CISA has confirmed active exploitation in the wild. EPSS exploitation probability: 39.81%.
Exploit ScenarioDerived	A local attacker with access to the system could corrupt memory to execute arbitrary code or crash the application.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 39.8% exploitation probability (EPSS)

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AnalysisAI

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. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Actively exploited in the wild (cisa kev) and EPSS exploitation probability 39.8%.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. 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 include: Microsoft Windows 10 1507, Microsoft Windows 7, Microsoft Windows 8, Microsoft Windows 8.1, Microsoft Windows Rt.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (microsoft) PRIMARY 8.2 HIGH

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

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Apr 21, 2026 - 15:31 CISA

CVE Published

Sep 09, 2015 - 00:59 cve.org

HIGH 8.2

DescriptionCVE.org

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.

Threat Intelligence Overview

Threat Score

4.3/10

Composite threat intelligence

EPSS Score

39.8%

Top 3% exploitable

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

CISA KEV

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC No

EPSS 39.8%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

High

Priority Score

131

Low Medium High Critical

KEV: +50

EPSS: +40

CVSS: +41

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Affected Products (CPE)CVE.org

cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_8:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_rt:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*

cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*

cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows_vista:-:sp2:*:*:*:*:*:*

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Same weakness CWE-119 – Buffer Overflow

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Same technique Buffer Overflow

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References

Advisories & patches

PATCH https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-097 ADVISORY https://vuldb.com/vuln/77647 REF http://www.securityfocus.com/bid/76608 REF http://www.securitytracker.com/id/1033485 REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-2546

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