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Vulnerabilities

Vulnerability · CVE-2026-26068

emp3r0r is a stealth-focused C2 designed by Linux users for Linux environments.

Published Feb 12, 2026 · catalog updated Feb 13, 2026 · emp3r0r is a stealth-focused

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-26068. EPSS is 3.79%. Act only if a listed version of emp3r0r is a stealth-focused is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (emp3r0r is a stealth-focused).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
3.79%
Remediation
Version ranges on file
Affected products
vendor jm33-m0 emp3r0r < 3.21.1

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor jm33-m0 emp3r0r < 3.21.1< 3.21.1

How to fix CVE-2026-26068

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-26068. EPSS is 3.79%. Act only if a listed version of emp3r0r is a stealth-focused is installed.

Which versions are affected?

Compare what you have installed with jm33-m0 emp3r0r < 3.21.1 < 3.21.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 3.79%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 12, 2026 · EUVD

    Detected

    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.

  2. Feb 13, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-26068

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26068

    30-day exploitation probability 3.79%

    first.org
  • EUVDVulnerability recordEUVD-2026-7373

    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 injecti

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • EUVDNov 3, 2026