CVE-2025-53138: Windows Routing and Remote Access Service (RRAS) Information Disclosure Vulnerability

Severity: medium (CVSS 5.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-12 · updated 2026-06-17
Weakness: CWE-908

Description

Use of uninitialized resource in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to disclose information over a network.

Affected products

Microsoft Windows Server 2008: r2-sp1
Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.8330 — fixed in 10.0.14393.8330
Microsoft Windows Server 2019: before 10.0.17763.7678 — fixed in 10.0.17763.7678
Microsoft Windows Server 2022: before 10.0.20348.3989 — fixed in 10.0.20348.3989
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1791 — fixed in 10.0.25398.1791
Microsoft Windows Server 2025: before 10.0.26100.4851 — fixed in 10.0.26100.4851
Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before 6.1.7601.27872 — fixed in 6.1.7601.27872
Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before 6.0.6003.23471 — fixed in 6.0.6003.23471
Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.25622 — fixed in 6.2.9200.25622
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22725 — fixed in 6.3.9600.22725
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8330 — fixed in 10.0.14393.8330
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7678 — fixed in 10.0.17763.7678
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.4052 — fixed in 10.0.20348.4052
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1791 — fixed in 10.0.25398.1791
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.4946 — fixed in 10.0.26100.4946

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.8330; Microsoft Windows Server 2019 10.0.17763.7678; Microsoft Windows Server 2022 10.0.20348.3989; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1791; Microsoft Windows Server 2025 10.0.26100.4851; Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.27872; Microsoft Windows Server 2008 Service Pack 2 6.0.6003.23471; Microsoft Windows Server 2012 6.2.9200.25622; Microsoft Windows Server 2012 R2 6.3.9600.22725; Microsoft Windows Server 2016 10.0.14393.8330; Microsoft Windows Server 2019 10.0.17763.7678; Microsoft Windows Server 2022 10.0.20348.4052. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53138

Get alerted when CVE-2025-53138 or the next vulnerability affects your stack