Skip to main content

Windows 11 24h2 CVE-2026-20851

MEDIUM
Out-of-bounds Read (CWE-125)
2026-01-13 secure@microsoft.com
Buffer Overflow Information Disclosure Microsoft Windows 11 24h2 Windows 11 25h2 Windows Server 2025
6.2
CVSS 3.1 · Vendor: microsoft
View

Vulnerability Assessment

Weakness
CWE
CWE-125
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, read limits
MITRE ATT&CK

1 technique across 1 tactic: Collection

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 6.2 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: None. Exploitation no authentication required. Exploitable via local access.
Exploit ScenarioDerived

An attacker without authentication could exploit this vulnerability to compromise the affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Information disclosure in Windows Capability Access Management Service (camsvc) enables local attackers to read sensitive data from memory without authentication on Windows 11 24h2, Windows 11 25h2, and Windows Server 2025. The out-of-bounds read vulnerability requires local access but no special privileges or user interaction to trigger. No patch is currently available for this issue.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 21:54 CVSS 6.2

Out-of-bounds read in Capability Access Management Service (camsvc) allows an unauthorized attacker to disclose information locally. [CVSS 6.2 MEDIUM]

RemediationAI

Monitor vendor advisories for a patch.

Affected Packages

microsoft windows_11_version_24h2_10_0_26100_7623 fix: Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.7623, Windows 11 Version 24H2 for x64-based Systems 10.0.26100.7623
microsoft windows_11_version_25h2_10_0_26200_7623 fix: Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.7623, Windows 11 Version 25H2 for x64-based Systems 10.0.26200.7623
microsoft windows_server_2025_10_0_26100_32230 fix: Windows Server 2025 10.0.26100.32230, Windows Server 2025 (Server Core installation) 10.0.26100.32230

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 3 packages in microsoft

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

Sign in to check
Technical ContextAI · show details

Classified as CWE-125 (Out-of-bounds Read). Affects the Capability Access Management component of Windows 11 24H2. Out-of-bounds read in Capability Access Management Service (camsvc) allows an unauthorized attacker to disclose information locally.

Know when Windows 11 24h2 gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources
Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

Vendor (microsoft) PRIMARY 6.2 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
ENISA EUVD HIGH

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

Out-of-bounds read in Capability Access Management Service (camsvc) allows an unauthorized attacker to disclose information locally.

Executive ViewAI

Why It Matters

CVE-2026-20851 presents moderate security risk, a out-of-bounds read vulnerability rated CVSS 6.2. Exploitation could cause memory corruption or application crashes. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: enable ASLR/DEP, apply network segmentation.

Threat Intelligence Overview

EPSS Score
0.0%
Top 89% exploitable
Threat Intel
1
1 source
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS NCSC-NL 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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact
Low

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +31
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: +5

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.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

More in Windows 11 24h2

View all
CVE-2025-33053 HIGH POC
8.8 Jun 10

Windows Internet Shortcut Files (.url) contain an external control vulnerability (CVE-2025-33053, CVSS 8.8) that enables
CVE-2025-33073 HIGH POC
8.8 Jun 10

Windows SMB contains an improper access control vulnerability (CVE-2025-33073, CVSS 8.8) enabling authenticated attacker
CVE-2013-3900 MEDIUM
5.5 Dec 11

Why is Microsoft republishing a CVE from 2013? We are republishing CVE-2013-3900 in the Security Update Guide to update

CVE-2025-21293 HIGH POC
8.8 Jan 14

Active Directory Domain Services contains an elevation of privilege vulnerability that allows authenticated domain users
CVE-2024-43461 HIGH
8.8 Sep 10

Windows MSHTML Platform Spoofing Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitab
CVE-2025-30397 HIGH POC
7.5 May 13

Microsoft Scripting Engine contains a type confusion vulnerability allowing unauthorized remote code execution over the

CVE-2024-49039 HIGH POC
8.8 Nov 12

Windows Task Scheduler Elevation of Privilege Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is low a
CVE-2026-96951 HIGH POC
8.8 Oct 13

Command injection in the Windows Shell lets remote, unauthenticated attackers bypass a Windows security feature and then
CVE-2026-81963 HIGH POC
7.8 Sep 08

Symlink following (CWE-59) in the Windows Update Stack enables a locally authenticated attacker with standard user privi
CVE-2025-26633 HIGH POC
7.0 Mar 11

A security feature bypass in Microsoft Management Console (MMC) allows attackers to evade security warnings and execute

CVE-2026-68820 HIGH POC
7.0 Aug 11

Privilege escalation in the Windows Ancillary Function Driver for WinSock (afd.sys) allows a locally authenticated attac
CVE-2025-32706 HIGH POC
7.8 May 13

Windows CLFS Driver contains an input validation flaw enabling local privilege escalation, yet another CLFS kernel vulne

Same weakness CWE-125 – Out-of-bounds Read

View all
CVE-2014-0160 HIGH POC
7.5
CVE-2016-5198 HIGH POC
8.8
CVE-2025-5777 CRITICAL POC
9.3
CVE-2016-1646 HIGH POC
8.8
CVE-2017-5030 HIGH POC
8.8
CVE-2016-4523 HIGH
7.5
CVE-2024-48456 HIGH POC
7.5
CVE-2024-48457 HIGH POC
7.5

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8

References

Advisories & patches
ADVISORY https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20851 ADVISORY https://vuldb.com/vuln/340782

Search Externally

GitHub PoC Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy