Home/CVE/Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute co
CVE

CVE-2026-20854

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute co

Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.

HIGH · CVSS 7.5 EPSS 0.00101
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
▤

Affected Products & Versions

3
microsoft windows 11 24h2< 10.0.26100.7623
microsoft windows 11 25h2< 10.0.26200.7623
microsoft windows server 2025< 10.0.26100.32230
▣

Scoring & Timeline

7.5
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 NVD13 Jan 2026 · 06:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/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.
⚑

Vendor Advisories

1
msrcCVE-2026-20854Remote Code Execution
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