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CVE-2026-40406

🗓️ 13 May 2026 20:22:39Reported by redhat.comType 
redhatcve
 redhatcve
🔗 access.redhat.com👁 9 Views

CVE-2026-40406: Use after free in Windows networking stack enables disclosure of information over a network.

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Microsoft KB
May 12, 2026—KB5087420 (OS Build 22631.7079)
12 May 202614:00
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May 12, 2026—Hotpatch KB5087423 (OS Build 26100.32772)
9 Jun 202614:00
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May 12, 2026—Hotpatch KB5087424 (OS Build 20348.5074)
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13 May 2026 20:22Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.00931
SSVC
9