CVE-2026-26068
CVE-2026-26068 is a critical-severity vulnerability in Jm33-m0 Emp3r0r with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.
Key facts
- Severity: Critical (CVSS 3.x base score 9.9)
- CVSS v4: 9.3
- EPSS exploit prediction: 3% (87th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-7373
- Weakness: CWE-78
- Affected product: Jm33-m0 Emp3r0r
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-26068?
- 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.
- How severe is CVE-2026-26068?
- CVE-2026-26068 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-26068 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-26068?
- CVE-2026-26068 affects Jm33-m0 Emp3r0r. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-26068?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-26068 have an EU (EUVD) identifier?
- Yes. CVE-2026-26068 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7373.
- When was CVE-2026-26068 published?
- CVE-2026-26068 was published on 2026-02-12 and last updated on 2026-06-17.
References
- https://github.com/jm33-m0/emp3r0r/commit/0cd64e4a26e7839a9a54bca3d756a665fcb7fda0
- https://github.com/jm33-m0/emp3r0r/releases/tag/v3.21.1
- https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-h5p4-4xp4-vjpp
Affected products (1)
- cpe:2.3:a:jm33-m0:emp3r0r:*:*:*:*:*:*:*:*
More vulnerabilities in Jm33-m0 Emp3r0r
- CVE-2026-26201 — High (CVSS 7.5): emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 3.21.2, multiple shared maps are…
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