Home/CVE/Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.
CVE

CVE-2026-40415

Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

Use after free in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

HIGH · CVSS 8.1 EPSS 0.00091
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Weakness Classification

CWE-416Use After Free
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Affected Products & Versions

11
microsoft windows 10 1809< 10.0.17763.8755
microsoft windows 10 21h2< 10.0.19044.7291
microsoft windows 10 22h2< 10.0.19045.7291
microsoft windows 11 23h2< 10.0.22631.7079
microsoft windows 11 24h2< 10.0.26100.8390
microsoft windows 11 25h2< 10.0.26200.8390
microsoft windows 11 26h1< 10.0.28000.2113
microsoft windows server 2019< 10.0.17763.8755
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Scoring & Timeline

8.1
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 May 2026 · 06:17 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2026-40415Remote Code Execution
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