CVE-2025-53145: Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

CVE-2025-53145 is a remote code execution vulnerability in Microsoft Message Queuing (MSMQ), rated Important by Microsoft, with a CVSS 3.1 base score of 8.8 (High). An attacker can exploit it remotely over the network, with low privileges and without user interaction. Microsoft has not reported exploitation in the wild and rates exploitation as less likely. The EPSS model estimates a 11.59% probability of exploitation activity in the next 30 days, higher than 96% of all scored vulnerabilities. Microsoft released the fix on 12 August 2025 in the August 2025 Patch Tuesday, delivered through 16 security updates (KB5063877, KB5063880, KB5063812, KB5063709 and more). It affects 37 products in 2 product families (Windows, ESU).

Key facts

CVE ID: CVE-2025-53145
Severity: High CVSS 8.8
Microsoft severity: Important
Impact: Remote Code Execution
Exploited in the wild: No
Publicly disclosed: No
Exploitation likelihood: Less Likely
Weakness: CWE-843
EPSS: 11.59% (percentile 96%)
CISA KEV: Not listed
Released: 12 August 2025
Last updated: 12 August 2025
Patch Tuesday: August 2025 Patch Tuesday
Product families: Windows, ESU

CVSS score and vector

Microsoft scores CVE-2025-53145 at 8.8 (temporal 7.7) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Metric	Value
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High
Exploit code maturity	Unproven
Remediation level	Official fix
Report confidence	Confirmed

Description

Access of resource using incompatible type ('type confusion') in Windows Message Queuing allows an authorized attacker to execute code over a network.

Frequently asked questions (Microsoft)

How could an attacker exploit the vulnerability?

To exploit this vulnerability, an authenticated attacker would need to send a specially crafted MSMQ packet to a MSMQ server. This could result in remote code execution on the server side.

Affected products (37)

Windows

Product	Security update	Type	Fixed build	Restart
Windows 10 Version 1809 for 32-bit Systems	KB5063877	Security Update	10.0.17763.7678	Yes
Windows 10 Version 1809 for x64-based Systems	KB5063877	Security Update	10.0.17763.7678	Yes
Windows Server 2019	KB5063877	Security Update	10.0.17763.7678	Yes
Windows Server 2019 (Server Core installation)	KB5063877	Security Update	10.0.17763.7678	Yes
Windows Server 2022	KB5063880 KB5063812	Security Update SecurityHotpatchUpdate	10.0.20348.4052 10.0.20348.3989	Yes Yes
Windows Server 2022 (Server Core installation)	KB5063880 KB5063812	Security Update SecurityHotpatchUpdate	10.0.20348.4052 10.0.20348.3989	Yes Yes
Windows 10 Version 21H2 for 32-bit Systems	KB5063709	Security Update	10.0.19044.6216	Yes
Windows 10 Version 21H2 for ARM64-based Systems	KB5063709	Security Update	10.0.19044.6216	Yes
Windows 10 Version 21H2 for x64-based Systems	KB5063709	Security Update	10.0.19044.6216	Yes
Windows Server 2025 (Server Core installation)	KB5063878 KB5064010	Security Update SecurityHotpatchUpdate	10.0.26100.4946 10.0.26100.4851	Yes Yes
Windows 11 Version 23H2 for ARM64-based Systems
Windows 11 Version 23H2 for x64-based Systems
Windows Server 2022, 23H2 Edition (Server Core installation)	KB5063899	Security Update	10.0.25398.1791	Yes
Windows 11 Version 24H2 for ARM64-based Systems	KB5063878 KB5064010	Security Update SecurityHotpatchUpdate	10.0.26100.4946 10.0.26100.4851	Yes Yes
Windows 11 Version 24H2 for x64-based Systems	KB5063878 KB5064010	Security Update SecurityHotpatchUpdate	10.0.26100.4946 10.0.26100.4851	Yes Yes
Windows Server 2025	KB5063878 KB5064010	Security Update SecurityHotpatchUpdate	10.0.26100.4946 10.0.26100.4851	Yes Yes
Windows 10 for 32-bit Systems	KB5063889	Security Update	10.0.10240.21100	Yes
Windows 10 for x64-based Systems	KB5063889	Security Update	10.0.10240.21100	Yes
Windows 10 Version 1607 for 32-bit Systems	KB5063871	Security Update	10.0.14393.8330	Yes
Windows 10 Version 1607 for x64-based Systems	KB5063871	Security Update	10.0.14393.8330	Yes
Windows Server 2016	KB5063871	Security Update	10.0.14393.8330	Yes
Windows Server 2016 (Server Core installation)	KB5063871	Security Update	10.0.14393.8330	Yes

ESU

Product	Security update	Type	Fixed build	Restart
Windows 11 Version 22H2 for ARM64-based Systems	KB5063875	Security Update	10.0.22621.5768	Yes
Windows 11 Version 22H2 for x64-based Systems	KB5063875	Security Update	10.0.22621.5768	Yes
Windows 10 Version 22H2 for x64-based Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for 32-bit Systems
Windows Server 2008 for 32-bit Systems Service Pack 2	KB5063888 KB5063948	Monthly Rollup Security Only	6.0.6003.23471 6.0.6003.23471	Yes Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	KB5063888 KB5063948	Monthly Rollup Security Only	6.0.6003.23471 6.0.6003.23471	Yes Yes
Windows Server 2008 for x64-based Systems Service Pack 2	KB5063888 KB5063948	Monthly Rollup Security Only	6.0.6003.23471 6.0.6003.23471	Yes Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	KB5063888 KB5063948	Monthly Rollup Security Only	6.0.6003.23471 6.0.6003.23471	Yes Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1	KB5063947 KB5063927	Monthly Rollup Security Only	6.1.7601.27872 6.1.7601.27872	Yes Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	KB5063947 KB5063927	Monthly Rollup Security Only	6.1.7601.27872 6.1.7601.27872	Yes Yes
Windows Server 2012	KB5063906	Monthly Rollup	6.2.9200.25622	Yes
Windows Server 2012 (Server Core installation)	KB5063906	Monthly Rollup	6.2.9200.25622	Yes
Windows Server 2012 R2	KB5063950	Monthly Rollup	6.3.9600.22725	Yes
Windows Server 2012 R2 (Server Core installation)	KB5063950	Monthly Rollup	6.3.9600.22725	Yes

Security updates (16)

KB5063877 (Security Update)
KB5063880 (Security Update)
KB5063812 (SecurityHotpatchUpdate)
KB5063709 (Security Update)
KB5063875 (Security Update)
KB5063878 (Security Update)
KB5064010 (SecurityHotpatchUpdate)
KB5063899 (Security Update)
KB5063889 (Security Update)
KB5063871 (Security Update)
KB5063888 (Monthly Rollup)
KB5063948 (Security Only)
KB5063947 (Monthly Rollup)
KB5063927 (Security Only)
KB5063906 (Monthly Rollup)
KB5063950 (Monthly Rollup)

NIST NVD data

NVD status: Analyzed
NVD CVSS: 8.8 (HIGH)
NVD weakness: CWE-843
Published to NVD: 12 August 2025
NVD last modified: 18 August 2025

Affected configurations (CPE)

Product	Vulnerable versions
windows 10 1507 (x64)	before 10.0.10240.21100
windows 10 1507 (x86)	before 10.0.10240.21100
windows 10 1607 (x64)	before 10.0.14393.8330
windows 10 1607 (x86)	before 10.0.14393.8330
windows 10 1809 (x64)	before 10.0.17763.7678
windows 10 1809 (x86)	before 10.0.17763.7678
windows 10 21h2	before 10.0.19044.6216
windows 10 22h2	before 10.0.19045.6216
windows 11 22h2	before 10.0.22621.5768
windows 11 23h2	before 10.0.22631.5768
windows 11 24h2	before 10.0.26100.4851
windows server 2008 (x64)	all listed versions
windows server 2008 (x86)	all listed versions
windows server 2008 r2 (x64)	all listed versions
windows server 2012	all listed versions
windows server 2012 r2	all listed versions
windows server 2016	before 10.0.14393.8330
windows server 2019	before 10.0.17763.7678
windows server 2022	before 10.0.20348.3989
windows server 2022 23h2	before 10.0.25398.1791
windows server 2025	before 10.0.26100.4851

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53145 (Vendor Advisory)

Acknowledgments

k0shl with Kunlun Lab

Revision history

Version	Date	Description
1.0	12 August 2025	Information published.