CVE-2026-26068

Name: CVE-2026-26068
Creator: NVD / NIST
Published: 2026-02-12T22:16:06.507+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 3.27%

Last modified Jun 17, 2026

CVE-2026-26068 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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. EPSS estimates a 3.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.9/10

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

CVSS 4.0

9.3/10

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

EPSS Probability

3.27%

86.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Jm33-M0	Emp3r0r	< 3.21.1

References

https://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0Patch
https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1Product, Release Notes
https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjppExploit, Vendor Advisory

Timeline

Published: Feb 12, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-26068?

How severe is CVE-2026-26068?

CVE-2026-26068 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 3.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-26068?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-26068?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST