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VULNERABILITIES

CVE-2026-61554 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34 CISA-ADP
https://github.com/jm33-m0/emp3r0r/releases/tag/v4.2.5 [email protected]
https://github.com/jm33-m0/emp3r0r/security/advisories/GHSA-4595-rvpx-4q34 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-400Uncontrolled Resource Consumption[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-61554
NVD Published Date:
Sep 15, 2026
NVD Last Modified:
Sep 16, 2026
Source:
[email protected]
CVE-2026-61554 Details - Not Deferred