CVE-2026-65184

Avocent ACS8000 wsserver command injection

State: Published
Severity: 9.8 Critical
Published: Oct 26, 2026
Updated: Oct 26, 2026
Reserved: Jul 21, 2026

Description

The root-privileged `wsserver` terminal-bridge daemon builds a shell command from client-supplied WebSocket fields and passes it to `system()` and `popen()` without quoting, escaping, or character-set validation. The daemon's public-key session path performs no appliance-session check.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	runZero

Weaknesses

CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')

Affected Products

Product	Versions
Avocent ACS8000Vertiv	2.32.4 and earlierAffected

References

https://www.runzero.com/advisories/avocent-acs8000-wsserver-cmdinj-cve-2026-65184third-party-advisory
https://www.runzero.com/blog/lights-out-exposed/related

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