CVE-2026-20854
Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability
CVSS v3
7.5
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
none
SSVC status
Description
Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
Technical details
- Published
- 2026-01-13
- Last Modified
- 2026-01-15
Frequently asked questions
What is CVE-2026-20854?
Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
Is CVE-2026-20854 actively exploited?
Active exploitation of CVE-2026-20854 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2026-20854?
CVE-2026-20854 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2026-20854 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
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