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CVE-2025-55225: Windows RRAS: Unapproved Access to Network Information

CVE-2025-55225 · published 1 year ago

Summary

An attacker can access sensitive information from a network by exploiting a flaw in Windows Routing and Remote Access Service. This can compromise the security of your network and potentially lead to unauthorized access to sensitive data. To mitigate this risk, consider updating your Windows system to the latest patches and configuring your network security settings accordingly.

What to do

Update microsoft windows_server_2016 to version 10.0.14393.8422 or later.
Update microsoft windows_server_2019 to version 10.0.17763.7792 or later.
Update microsoft windows_server_2022 to version 10.0.20348.4106 or later.
Update microsoft windows_server_2022_23h2 to version 10.0.25398.1849 or later.
Update microsoft windows_server_2025 to version 10.0.26100.6508 or later.

Affected software

Vendor	Product	Affected versions
microsoft	windows_server_2008	r2 `cpe:2.3:o:microsoft:windows_server_2008:-:sp2:::::x64:*`
microsoft	windows_server_2012	r2 `cpe:2.3:o:microsoft:windows_server_2012:-:::::::*`
microsoft	windows_server_2016	< 10.0.14393.8422 `cpe:2.3:o:microsoft:windows_server_2016::::::::`
microsoft	windows_server_2019	< 10.0.17763.7792 `cpe:2.3:o:microsoft:windows_server_2019::::::::`
microsoft	windows_server_2022	< 10.0.20348.4106 `cpe:2.3:o:microsoft:windows_server_2022::::::::`
microsoft	windows_server_2022_23h2	< 10.0.25398.1849 `cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::`
microsoft	windows_server_2025	< 10.0.26100.6508 `cpe:2.3:o:microsoft:windows_server_2025::::::::`

Original advisory text

Out-of-bounds read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55225 Vendor Advisory

Fix within

Internet-facing 60 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit
Gives an attacker partial control

Severity

6.5 Medium

Exploitation

1% chance of attack within 30 days

Type

CWE-125Out-of-bounds Read

Timeline

Published9 Sep 2025

Updated4 Nov 2026

First seen7 Mar 2026

Sources

CVE-2025-55225 · NVD

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