VULNERABILITY INTELLIGENCE

CVE-2026-26068

CVSS score9.9 CRITICAL
EPSS probability3.79%
CISA KEVNot currently listed
Published2026-02-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-77
  • nvd@nist.gov: CWE-78

Primary references