CVE-2026-50447: Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability
Published Jul 14, 2026
·Updated
Heap-based buffer overflow in Windows Message Queuing allows an unauthorized attacker to execute code over a network.
Other sources
Windows Message Queuing Service (MSMQ) Remote Code Execution Vulnerability
— Microsoft
Affected Software
50 affected componentsFixes available
Microsoft Windows Server 2016<10.0.14393.9339
10.0.14393.9339
Microsoft Windows 10=1607
10.0.14393.9339
Microsoft Windows 11=26H1
10.0.28000.2269
Microsoft Windows Server 2025<10.0.26100.33158
10.0.26100.33158
Microsoft Windows 11=24H2
10.0.26100.8875
Microsoft Windows 11=26H1
10.0.28000.2525
Microsoft Windows 10=1607
10.0.14393.9339
Microsoft Windows 11=24H2
10.0.26100.8875
Microsoft Windows 11=25H2
10.0.26200.8875
Microsoft Windows 11=25H2
10.0.26200.8875
Microsoft Windows 10=22H2
10.0.19045.7548
Microsoft Windows Server 2025<10.0.26100.33158
10.0.26100.33158
Microsoft Windows 10=22H2
10.0.19045.7548
Microsoft Windows 10=21H2
10.0.19044.7548
Microsoft Windows 10=22H2
10.0.19045.7548
Microsoft Windows 10=21H2
10.0.19044.7548
Microsoft Windows Server 2012 R2<6.3.9600.23291
6.3.9600.23291
Microsoft Windows 10=21H2
10.0.19044.7548
Microsoft Windows Server 2012 R2<6.3.9600.23291
6.3.9600.23291
Microsoft Windows Server 2012<6.2.9200.26226
6.2.9200.26226
Microsoft Windows Server 2012<6.2.9200.26226
6.2.9200.26226
Microsoft Windows Server 2016<10.0.14393.9339
10.0.14393.9339
Microsoft Windows Server 2019<10.0.17763.9020
10.0.17763.9020
Microsoft Windows Server 2019<10.0.17763.9020
10.0.17763.9020
Microsoft Windows 10=1809
10.0.17763.9020
Microsoft Windows 10=1809
10.0.17763.9020
Microsoft Windows Server 2022<10.0.20348.5386
10.0.20348.5386
Microsoft Windows 10 1607<10.0.14393.9339
Microsoft Windows 10 1607<10.0.14393.9339
Microsoft Windows 10 1809<10.0.17763.9020
Microsoft Windows 10 1809<10.0.17763.9020
Microsoft Windows 10 21h2<10.0.19044.7548
Microsoft Windows 10 21h2<10.0.19044.7548
Microsoft Windows 10 21h2<10.0.19044.7548
Microsoft Windows 10 22h2<10.0.19045.7548
Microsoft Windows 10 22h2<10.0.19045.7548
Microsoft Windows 10 22h2<10.0.19045.7548
Microsoft Windows 11 24h2<10.0.26100.8875
Microsoft Windows 11 24h2<10.0.26100.8875
Microsoft Windows 11 25h2<10.0.26200.8875
Microsoft Windows 11 25h2<10.0.26200.8875
Microsoft Windows 11 26h1<10.0.28000.2269
Microsoft Windows 11 26h1<10.0.28000.2525
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016<10.0.14393.9339
Microsoft Windows Server 2019<10.0.17763.9020
Microsoft Windows Server 2022<10.0.20348.5386
Microsoft Windows Server 2025<10.0.26100.33158
Microsoft Windows 11=26H1
10.0.28000.2525
Remediation
Event History
Jul 14, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:07 PM
Data Sourced
via MITRE·05:07 PM
DescriptionSeverity
Data Sourced
via NVD·06:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-50447?
CVE-2026-50447 has a critical severity rating of 9.8.
2
How do I fix CVE-2026-50447?
To fix CVE-2026-50447, apply the security updates provided by Microsoft for affected Windows versions.
3
What systems are affected by CVE-2026-50447?
CVE-2026-50447 affects Microsoft Windows 10, Windows 11, and various versions of Windows Server.
4
What type of vulnerability is CVE-2026-50447?
CVE-2026-50447 is a heap-based buffer overflow vulnerability.
5
What can an attacker do by exploiting CVE-2026-50447?
An attacker can execute arbitrary code over a network by exploiting CVE-2026-50447.