Vulnerability record · CVE-2026-26068 · published 12 February 2026

CVE-2026-26068: Jm33-m0 emp3r0r command injection vulnerability

JJm33 M0 · Emp3r0r

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 4.0 Critical EPSS 3.7% · top 10.6% CWE-77 · Command injectionCWE-78 · OS command injection

9.3CVSS 4.0 base score

3.7%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References, 1 tagged exploit

17 Jun 2026Last modified by NVD

Description

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

JEmp3r0r Jm33 M0

References

Link	Tags
https://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0	Patch
https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1	ProductRelease Notes
https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp	ExploitVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-26068), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.