Vulnerability Description
emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 4.2.5, the `http_poll` C2 transport accepts attacker-controlled HTTP polling sessions before CBOR `MsgAuth` authentication is completed. A remote unauthenticated attacker can create arbitrary polling sessions and send request bodies that are forwarded into the C2 dispatch path. This can consume server resources and trigger pre-auth C2 processing. Version 4.2.5 patches the issue.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5
- https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34
- https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34
FAQ
What is CVE-2026-61554?
CVE-2026-61554 is a vulnerability with a CVSS score of 7.5 (HIGH). emp3r0r is a C2 designed by Linux users for Linux environments. Prior to version 4.2.5, the `http_poll` C2 transport accepts attacker-controlled HTTP polling sessions before CBOR `MsgAuth` authenticat...
How severe is CVE-2026-61554?
CVE-2026-61554 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61554?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.