CVE-2026-26068

CRITICAL

emp3r0r <3.21.1 - Command Injection, Remote Code Execution

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 9.9
EPSS 0.0066
EPSS Percentile 71.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-77 CWE-78
Status published
Products (1)
jm33-m0/emp3r0r < 3.21.1
Published Feb 12, 2026
Tracked Since Feb 18, 2026