EUVD-2026-56357
GHSA-2v9v-p7ff-4536
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only exploitation requiring an authenticated low-privilege session against an MSMQ-enabled host; full C/I/A reflects SYSTEM-level privilege escalation with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Message Queuing allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via heap-based buffer overflow in Windows Message Queuing (MSMQ) allows a locally authenticated attacker with low privileges to gain SYSTEM-level access across a wide range of Microsoft Windows desktop and server editions. The flaw, classified as CWE-122, spans from Windows Server 2012 through Windows Server 2025 and Windows 10/11 across multiple feature update channels, making it broadly relevant in enterprise environments where MSMQ is deployed. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session on the target Windows host with at least low-privilege (standard user) credentials, as confirmed by the CVSS vector PR:L and AV:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects an LPE flaw that is reliable once an attacker has local access: low complexity and no user interaction mean exploitation does not depend on timing or social engineering. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is applying the vendor-released patch via Microsoft's standard Windows Update or WSUS channels; fixed versions per EUVD-2026-56357 are: Windows Server 2012 build 6.2.9200.26279, Windows Server 2012 R2 build 6.3.9600.23337, Windows Server 2016/Windows 10 1607 build 10.0.14393.9418, Windows Server 2019/Windows 10 1809 build 10.0.17763.9115, Windows Server 2022 build 10.0.20348.5499, Windows Server 2025 build 10.0.26100.33296, Windows 11 23H2 build 10.0.22631.7517, Windows 11 24H2 build 10.0.26100.9168, Windows 11 25H2 build 10.0.26200.9168, and Windows 11 26H1 build 10.0.28000.2704. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Windows Message Queuing using your asset management tools and identify affected Windows versions (Server 2012-2025, Windows 10/11). …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Windows 10 1607
View allWindows MSHTML component contains a remote code execution vulnerability that allows attackers to craft malicious ActiveX
<p>A remote code execution vulnerability exists when the Windows Print Spooler service improperly performs privileged fi
Windows MSDT (Microsoft Support Diagnostic Tool) allows remote code execution when called via the ms-msdt URL protocol f
The Windows VBScript engine contains a remote code execution vulnerability in object handling that allows full system co
Windows Print Spooler Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no auth
Windows Search Remote Code Execution Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely explo
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
Windows Kernel contains a TOCTOU race condition vulnerability allowing local privilege escalation, exploited by the OilR
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in
Windows Internet Shortcut Files (.url) contain an external control vulnerability (CVE-2025-33053, CVSS 8.8) that enables
Elevation of privilege in the Windows Win32k kernel-mode driver allows a local, low-privileged attacker to escalate to S
Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today