CVE-2026-26068

Summary

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.

Affected Software

Weaknesses

• CWE-77: CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
• CWE-78: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

References

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

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