emp3r0r is a stealth-focused C2 designed by Linux users for Linux environments. Prior to 3.21.1, untrusted agent metadata (Transport, Hostname) is accepted during check-in and later interpolated into tmux shell command strings executed via /bin/sh -c. This enables command injection and remote code execution on the operator host. This vulnerability is fixed in 3.21.1.
History

Fri, 13 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Jm33-m0
Jm33-m0 emp3r0r
Vendors & Products Jm33-m0
Jm33-m0 emp3r0r

Fri, 13 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 12 Feb 2026 22:15:00 +0000

Type Values Removed Values Added
Description emp3r0r is a stealth-focused C2 designed by Linux users for Linux environments. Prior to 3.21.1, untrusted agent metadata (Transport, Hostname) is accepted during check-in and later interpolated into tmux shell command strings executed via /bin/sh -c. This enables command injection and remote code execution on the operator host. This vulnerability is fixed in 3.21.1.
Title emp3r0r Agent-Controlled Metadata to Operator RCE (tmux Command Injection)
Weaknesses CWE-77
CWE-78
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-12T22:01:23.212Z

Updated: 2026-02-13T17:17:57.660Z

Reserved: 2026-02-10T18:01:31.900Z

Link: CVE-2026-26068

cve-icon Vulnrichment

Updated: 2026-02-13T17:17:51.518Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-12T22:16:06.507

Modified: 2026-02-13T14:23:48.007

Link: CVE-2026-26068

cve-icon Redhat

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