Back to board Open MSRC
MSRC compact vulnerability detail

CVE-2025-26634 · Windows Core Messaging Elevation of Privileges Vulnerability

Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network.

Severity
Important
Impact
Elevation of Privilege
CVSS
7.5 base · 6.5 temporal
Release
2025-03-11
Signals
Windows Core Messaging Elevation of Privilege Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-122: Heap-based Buffer Overflow
Patch Diff
Loading module diff metadata...
Resolved binary override
Use this when the MSRC module name cannot be mapped automatically or the resolved binary looks wrong.
Old version New version
Description
Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network.
FAQ / Articles
Windows Core Messaging Elevation of Privilege Vulnerability
Heap-based buffer overflow in Windows Core Messaging allows an authorized attacker to elevate privileges over a network.
FAQ
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to gather information specific to the environment and take additional actions prior to exploitation to prepare the target environment.
FAQ
What privileges could be gained by an attacker who successfully exploited this vulnerability? An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.