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High MSRC-CVE-2026-34329 1 CVE

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Published May 12, 2026 · Updated May 12, 2026

Summary

Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

How could an attacker exploit this vulnerability?
An attacker could send a specially crafted message over the network to a system running the Windows Message Queuing (MSMQ) service. This message is processed by the MSMQ service and triggers a memory corruption condition, which could allow the attacker to run code on the affected system.

According to the CVSS score, the attack vector is adjacent (AV:A). What does this mean for this vulnerability?
This attack is limited to systems connected to the same network segment as the attacker. The attack cannot be performed across multiple networks (for example, a WAN) and would be limited to systems on the same network switch or virtual network.

Security updates
10.0.17763.8755 — https://support.microsoft.com/help/5087538
10.0.20348.5139 — https://support.microsoft.com/help/5087545
10.0.20348.5074 — https://support.microsoft.com/help/5087424
10.0.19044.7291 — https://support.microsoft.com/help/5087544
10.0.19045.7417 — https://support.microsoft.com/help/5094127
10.0.26100.32860 — https://support.microsoft.com/help/5087539
10.0.26100.32772 — https://support.microsoft.com/help/5087423
10.0.26200.8457 — https://support.microsoft.com/help/5089549
10.0.26200.8390 — https://support.microsoft.com/help/5089466
10.0.22631.7079 — https://support.microsoft.com/help/5087420
10.0.22631.7219 — https://support.microsoft.com/help/5093998
10.0.25398.2330 — https://support.microsoft.com/help/5087541
10.0.28000.2113 — https://support.microsoft.com/help/5089548
10.0.14393.9140 — https://support.microsoft.com/help/5087537
6.2.9200.26079 — https://support.microsoft.com/help/5087470
6.3.9600.23181 — https://support.microsoft.com/help/5087471

Vulnerabilities 1

Revision history

  1. #1

    Information published.

References