CVE-2026-65184

CRITICAL 9.8

Avocent ACS8000 wsserver command injection

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78
Vendor	vertiv
Product	avocent acs8000
Published	Oct 26, 2026
Last Updated	Oct 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Vertiv / Avocent ACS8000

0 ≤ 2.32.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

HD Moore of runZero Tod Beardsley of runZero