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.
CVE-2026-26068
CRITICALNVD 9.99.9—Elevated
EchelonGraph scoreMEDIUM confidence
This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 3.3%, top 13% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.9Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.9
- EG Score
- 9.9(medium)
- EG Risk
- 61(Track*)EG Risk 61/100SSVC: Track*
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity99% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Watch closely — could escalate to Attend. - EPSS PROB
- 3%
- EPSS %ILE
- 88%
- KEV
- Not listed
Published
February 12, 2026
Last Modified
June 17, 2026
References (3)
- security-advisories@githubhttps://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0
- security-advisories@githubhttps://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1
- security-advisories@githubhttps://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp
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Frequently asked(5)
What is CVE-2026-26068?
CVE-2026-26068 is a critical vulnerability published on February 12, 2026. 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…
When was CVE-2026-26068 disclosed?
CVE-2026-26068 was first published in the National Vulnerability Database on February 12, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26068 actively exploited?
CVE-2026-26068 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 11.7% of all scored CVEs.
What is the CVSS score of CVE-2026-26068?
CVE-2026-26068 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-26068?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-26068, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-26068
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