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Multiple Remote Code Execution Vulnerabilities in Windows Routing and Remote Access Service (RRAS)

Indian – Computer Emergency Response Team (https://www.cert-in.org.in)

Severity Rating: HIGH

Software Affected

Microsoft Windows Routing and Remote Access Service (RRAS) versions prior to OS Builds 26200.7982 and 26100.7982

Overview

Multiple vulnerabilities have been reported in Microsoft Windows Routing and Remote Access Service (RRAS) which could allow an attacker to execute arbitrary code on the targeted system in the context of RRAS service.

Target Audience:

All System administrators, Network administrators and organizations using Microsoft Windows systems with RRAS enabled.

Risk Assessment:

High risk of remote code execution, unauthorized access, system compromise.

Impact Assessment:

Potential for data theft, execution of malicious code, unauthorized actions on the affected system.

Description

Windows Routing and Remote Access Service (RRAS) is a Microsoft Windows component that provides routing, remote access and VPN services for enterprise environments.

Multiple vulnerabilities exist in the RRAS management component due to improper handling of memory conditions such as integer overflow or wraparound. An attacker could exploit these vulnerabilities by tricking a user into connecting to a specially crafted or malicious remote server via the RRAS snap-in.

Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code on the targeted system in the context of RRAS service.

Solution

Apply appropriate software updates as mentioned:

https://support.microsoft.com/en-us/topic/march-13-2026-hotpatch-kb5084597-os-builds-26200-7982-and-26100-7982-out-of-band-ef323fee-e70f-4f43-8bbc-1021c435bf5c

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25172

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25173

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26111

Vendor Information

Microsoft

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25172

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25173

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26111

References

Microsoft

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25172

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-25173

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26111

CVE Name

CVE-2026-25172

CVE-2026-25173

CVE-2026-26111

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Thanks and Regards,

CERT-In

Incident Response Help Desk

e-mail: incident@cert-in.org.in

Phone: +91-11-22902657

Toll Free Number: 1800-11-4949

Toll Free Fax : 1800-11-6969

Web: http://www.cert-in.org.in

PGP Fingerprint: A768 083E 4475 5725 B81A A379 2156 C0C0 B620 D0B4

PGP Key information:

https://www.cert-in.org.in/s2cMainServlet?pageid=CONTACTUS

Postal address:

Indian Computer Emergency Response Team (CERT-In)

Ministry of Electronics and Information Technology

Government of India

Electronics Niketan

6, C.G.O. Complex

New Delhi-110 003

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