CVE-2026-83997: Windows Message Queuing Remote Code Execution Vulnerability
Published Sep 8, 2026
·Updated
Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
Other sources
Windows Message Queuing Remote Code Execution Vulnerability
— Microsoft
Affected Software
34 affected componentsFixes available
Microsoft Windows 11=26H1
10.0.28000.2954
Microsoft Windows 11=26H1
10.0.28000.2954
Microsoft Windows 11=24H2
10.0.26100.9445
Microsoft Windows 11=23H2
10.0.22631.7582
Microsoft Windows 11=24H2
10.0.26100.9445
Microsoft Windows Server 2025<10.0.26100.33438
10.0.26100.33438
Microsoft Windows 11=25H2
10.0.26200.9445
Microsoft Windows 10=22H2
10.0.19045.7725
Microsoft Windows 11=23H2
10.0.22631.7582
Microsoft Windows 11=25H2
10.0.26200.9445
Microsoft Windows Server 2025<10.0.26100.33438
10.0.26100.33438
Microsoft Windows 10=21H2
10.0.19044.7725
Microsoft Windows 10=22H2
10.0.19045.7725
Microsoft Windows 10=21H2
10.0.19044.7725
Microsoft Windows 10=22H2
10.0.19045.7725
Microsoft Windows Server 2022<10.0.20348.5622
10.0.20348.5622
Microsoft Windows Server 2022<10.0.20348.5622
10.0.20348.5622
Microsoft Windows 10=21H2
10.0.19044.7725
Microsoft Windows 10 21h2<10.0.19044.7725
Microsoft Windows 10 21h2<10.0.19044.7725
Microsoft Windows 10 21h2<10.0.19044.7725
Microsoft Windows 10 22h2<10.0.19045.7725
Microsoft Windows 10 22h2<10.0.19045.7725
Microsoft Windows 10 22h2<10.0.19045.7725
Microsoft Windows 11 23h2<10.0.22631.7582
Microsoft Windows 11 23h2<10.0.22631.7582
Microsoft Windows 11 24h2<10.0.26100.9445
Microsoft Windows 11 24h2<10.0.26100.9445
Microsoft Windows 11 25h2<10.0.26200.9445
Microsoft Windows 11 25h2<10.0.26200.9445
Microsoft Windows 11 26h1<10.0.28000.2954
Microsoft Windows 11 26h1<10.0.28000.2954
Microsoft Windows Server 2022<10.0.20348.5622
Microsoft Windows Server 2025<10.0.26100.33438
Remediation
Event History
Sep 8, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·05:19 PM
Data Sourced
via MITRE·05:19 PM
DescriptionSeverity
Data Sourced
via NVD·06:21 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What level of access does an attacker need to exploit this issue?
The vulnerability can be exploited remotely over a network without prior authentication or user interaction. Exploitation has high attack complexity.
2
What is the potential impact of successful exploitation?
Successful exploitation may allow an attacker to execute code. The supplied severity metrics indicate high potential impact to confidentiality, integrity, and availability.
3
Which systems should be assessed for exposure?
Assess Microsoft Windows 10, Windows 11, Windows Server 2022, and Windows Server 2025 systems, particularly those where Windows Message Queuing is reachable over the network.