CVE-2026-40413HighCVSS 7.4

Windows TCP/IP Denial of Service Vulnerability

Published
May 22, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-40413 →

📋 Description

According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability? In this case, a successful attack could be performed from a low privilege Hyper-V guest. The attacker could traverse the guest's security boundary to cause denial of service on the Hyper-V host environment.

According to the CVSS score, the attack vector is adjacent (AV:A). What does this mean for this vulnerability? This attack is limited to systems connected to the same network segment as the attacker. The attack cannot be performed across multiple networks (for example, a WAN) and would be limited to systems on the same network switch or virtual network.

🎯 Affected products25

  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 10 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 11 Version 25H2 for ARM64-based Systems
  • Windows 11 Version 25H2 for x64-based Systems
  • Windows 11 Version 26H1 for ARM64-based Systems
  • Windows 11 version 26H1 for x64-based Systems
  • 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

KB5087538 (Security Update) — fixed build 10.0.17763.8755 KB5087545 (Security Update) — fixed build 10.0.20348.5139 KB5087424 (Security Hotpatch Update) — fixed build 10.0.20348.5074 KB5087544 (Security Update) — fixed build 10.0.19044.7291 KB5094127 (Security Update) — fixed build 10.0.19045.7417 KB5087539 (Security Update) — fixed build 10.0.26100.32860 KB5087423 (Security Hotpatch Update) — fixed build 10.0.26100.32772 KB5089549 (Security Update) — fixed build 10.0.26200.8457 KB5089466 (Security Hotpatch Update) — fixed build 10.0.26200.8390 KB5087420 (Security Update) — fixed build 10.0.22631.7079 KB5093998 (Security Update) — fixed build 10.0.22631.7219 KB5087541 (Security Update) — fixed build 10.0.25398.2330 KB5089549 (Security Update) — fixed build 10.0.26100.8457 KB5089466 (Security Hotpatch Update) — fixed build 10.0.26100.8390 KB5089548 (Security Update) — fixed build 10.0.28000.2113 KB5087537 (Security Update) — fixed build 10.0.14393.9140 KB5087470 (Monthly Rollup) — fixed build 6.2.9200.26079 KB5087471 (Monthly Rollup) — fixed build 6.3.9600.23181

🔗 References (33)