CVE-2025-21208HighCVSS 8.8

Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability

Published
June 3, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2025-21208 →

📋 Description

How could an attacker exploit this vulnerability? An attacker could exploit this vulnerability by tricking a user into sending a request to a malicious server. This could result in the server returning malicious data that might cause arbitrary code execution on the user's system.

According to the CVSS metric, the attack vector is network (AV:N) and the user interaction is required (UI:R). What is the target context of the remote code execution? This attack requires an admin user on the client to connect to a malicious server, and that could allow the attacker to gain code execution on the client.

🎯 Affected products19

  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)

✅ Remediation

KB5052000 (Security Update) — fixed build 10.0.17763.6893 KB5051979 (Security Update) — fixed build 10.0.20348.3207 KB5052106 (SecurityHotpatchUpdate) — fixed build 10.0.20348.3148 KB5051987 (Security Update) — fixed build 10.0.26100.3194 KB5052105 (SecurityHotpatchUpdate) — fixed build 10.0.26100.3107 KB5051980 (Security Update) — fixed build 10.0.25398.1425 KB5052006 (Security Update) — fixed build 10.0.14393.7785 KB5052038 (Monthly Rollup) — fixed build 6.0.6003.23117 KB5052072 (Security Only) — fixed build 6.0.6003.23117 KB5052016 (Monthly Rollup) — fixed build 6.1.7601.27566 KB5052032 (Security Only) — fixed build 6.1.7601.27566 KB5052020 (Monthly Rollup) — fixed build 6.2.9200.25317 KB5052042 (Monthly Rollup) — fixed build 6.3.9600.22417

🔗 References (25)