CVE-2026-26068
Critical
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.
SeverityCritical
CVSS9.9
Exploit probability—
ProductJm33-m0 Emp3r0r
PublishedFeb 12, 2026
First seenFeb 12, 2026
Weakness typeCWE-77Command injectionCWE-78OS command injection
How to fix
Update
- jm33-m0 emp3r0r3.21.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jm33-m0 emp3r0r | v < 3.21.1 | 3.21.1 |
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