CVE-2026-26068

CRITICAL

9.9

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.

CVE Details

CVSS v3.1 Score9.9

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published2/12/2026

Last Modified2/25/2026

Sourcenvd

Honeypot Sightings0

Affected Products

jm33-m0:emp3r0r

Weaknesses (CWE)

CWE-77CWE-78CWE-78

References

https://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0(security-advisories@github.com)

https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1(security-advisories@github.com)

https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp(security-advisories@github.com)

IOC Correlations

No correlations recorded

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