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CVE-2023-21554

CriticalPublished

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Published: Apr 11, 2023
Updated: Jan 23, 2025
Assigning CNA: microsoft
Evidence observed: Aug 7, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

95.5%

High · next 30 days

Percentile: 99.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

Sources

CVE-2023-21554-PoCPoC
CVE-2023-21554 Windows MessageQueuing PoC，分析见 https://www.zoemurmure.top/posts/cve_2023_21554/
CVE-2023-21554-PoCPoC
Python proof of concept for CVE-2023-21554 (QueueJumper) in Microsoft MSMQ, constructing SRMP messages over TCP/1801 to verify the integer-overflow condition.
CVE-2023-21554PoC
Python proof-of-concept for CVE-2023-21554 targeting Windows Message Queuing; crashes mqsvc.exe to demonstrate the vulnerability.
CVE-2023-21554

Responsible use

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PoC

Proof-of-concept exploit for CVE-2023-21554, enabling targeted vulnerability testing and security assessment of affected systems.

CVE-2023-21554PoC

CVE-2023-21554 PoC