CVE-2026-34329: Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability
Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over an adjacent network.
Other sources
Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.3.9600.23181Patch KB5087471 - Upgrade
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Fixed in 6.2.9200.26079Patch KB5087470 - Upgrade
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Fixed in 10.0.28000.2113Patch KB5089548 - Upgrade
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Fixed in 10.0.14393.9140Patch KB5087537 - Upgrade
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Fixed in 10.0.26100.32860Fixed in 10.0.26100.32772Patch KB5087423 - Upgrade
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Fixed in 10.0.26100.8457Fixed in 10.0.26100.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.22631.7219Patch KB5093998 - Upgrade
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Fixed in 10.0.22631.7079Patch KB5087420 - Upgrade
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Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.19044.7291Patch KB5087544 - Upgrade
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Fixed in 10.0.25398.2330Patch KB5087541 - Upgrade
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Fixed in 10.0.26200.8457Fixed in 10.0.26200.8390Patch KB5089466 - Upgrade
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Fixed in 10.0.20348.5139Fixed in 10.0.20348.5074Patch KB5087424 - Upgrade
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Fixed in 10.0.17763.8755Patch KB5087538
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34329?
CVE-2026-34329 is rated as critical due to its potential for remote code execution.
How do I fix CVE-2026-34329?
To fix CVE-2026-34329, ensure that you apply the latest security patches provided by Microsoft for the affected products.
What systems are affected by CVE-2026-34329?
CVE-2026-34329 affects various versions of Windows Server and Windows operating systems, including multiple releases of Windows 10 and 11.
Can CVE-2026-34329 be exploited remotely?
Yes, CVE-2026-34329 can be exploited remotely if an attacker has access to the adjacent network.
What impact does CVE-2026-34329 have on my system?
CVE-2026-34329 allows attackers to execute arbitrary code on compromised systems, potentially leading to complete system takeover.