RCE in Jm33-M0 Emp3r0r
CVE-2026-26068
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.037 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.037 · change: +0.004
Affected products
- Jm33-M0 Emp3r0r — versions < 3.21.1
Weakness classification (CWE)
References
- github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp (Exploit, Vendor Advisory)
- github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0 (Patch)
- github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-26068?
- CVE-2026-26068 is a critical-severity vulnerability in Jm33-M0 Emp3r0r, classified under Command Injection. CVSS score: 9.9/10. Published 2026-02-12.
- How severe is CVE-2026-26068?
- Critical severity. CVSS v3 base score is 9.9 out of 10.