Emp3r0r
CVE-2026-26068
CRITICAL
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
Command injection in emp3r0r C2 framework before 3.21.1. Untrusted agent metadata (Transport, Hostname) injected into commands. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Authenticated access to emp3r0r C2 server required. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 9.9, EPSS 0.61%. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Rogue agent reports metadata containing command injection payload, which executes on the C2 server when processed. |
| Remediation | Update to 3.21.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running emp3r0r and isolate affected C2 infrastructure from production networks. …
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