CVE-2026-26068 | THREATINT

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.

PUBLISHED Reserved 2026-02-10 | Published 2026-02-12 | Updated 2026-02-13 | Assigner GitHub_M

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Problem types

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

< 3.21.1

affected

References

github.com/...mp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp

github.com/...ommit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0

github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1

cve.org (CVE-2026-26068)

nvd.nist.gov (CVE-2026-26068)

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