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MSRC compact vulnerability detail

CVE-2025-50177 · Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.

Severity
Critical
Impact
Remote Code Execution
CVSS
8.1 base · 7.1 temporal
Release
2025-08-12
Signals
Windows Message Queuing Remote Code Execution Exploited: No Publicly disclosed: No Exploitability: Exploitation More Likely
CWE
CWE-416: Use After Free CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Patch Diff
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Resolved binary override
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Description
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
FAQ / Articles
FAQ
How could an attacker exploit the vulnerability? To exploit this vulnerability, an attacker would need to send a series of specially crafted MSMQ packets in a rapid sequence over HTTP to a MSMQ server. This could result in remote code execution on the server side.
Windows Message Queuing Remote Code Execution Vulnerability
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code 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 win a race condition.