CVE-2026-26068

critical · 9.3

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.

9.3

CVSS

3.4%

EPSS (exploit prob.)

88th

EPSS percentile

2026-02-12

Published

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-77CWE-78

Affected products

Vendor	Product	Affected versions
jm33-m0	emp3r0r	< 3.21.1

Check a specific version with /api/v1/cve/match.

References

https://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0
https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1
https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-26068