CVE-2026-40378

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CVSS 3.1

7.5 high

EPSS

1%p66

Published

Jul 14, 2026 (Jul 14, 2026)

Modified

Jul 22, 2026

Description

Memory allocation with excessive size value in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.

Vendors: microsoft
Products: windows 10 1607, windows 10 1809, windows 10 21h2, windows 10 22h2, windows 11 23h2, windows 11 24h2, windows 11 25h2, windows 11 26h1, windows server 2012, windows server 2016, windows server 2019, windows server 2022
Weakness: CWE-789
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.2%)

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