CVE-2025-21254HighCVSS 6.5

Internet Connection Sharing (ICS) Denial of Service Vulnerability

Published
June 3, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2025-21254 →

📋 Description

According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of availability (A:H). What does that mean for this vulnerability? An attacker can send specially crafted packets which could affect availability of the service and result in Denial of Service (DoS).

🎯 Affected products25

  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows 11 Version 24H2 for ARM64-based Systems
  • Windows 11 Version 24H2 for x64-based Systems
  • 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 KB5051974 (Security Update) — fixed build 10.0.19044.5487 KB5051989 (Security Update) — fixed build 10.0.22621.4890 KB5051974 (Security Update) — fixed build 10.0.19045.5487 KB5051987 (Security Update) — fixed build 10.0.26100.3194 KB5052105 (SecurityHotpatchUpdate) — fixed build 10.0.26100.3107 KB5051989 (Security Update) — fixed build 10.0.22631.4890 KB5051980 (Security Update) — fixed build 10.0.25398.1425 KB5052006 (Security Update) — fixed build 10.0.14393.7785

🔗 References (17)