What is CVE-2026-6564?

CVE-2026-6564 is a medium-severity vulnerability in Emq Emqx Enterprise, classified under Incorrect Privilege Assignment. CVSS score: 4.3/10. Published 2026-04-19.

How severe is CVE-2026-6564?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Emq Emqx Enterprise

CVE-2026-6564

A vulnerability was found in EMQ EMQX Enterprise up to 6.1.0. The impacted element is an unknown function of the component Session Handling. The manipulation results in improper authorization. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Published 2026-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (35.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Emq Emqx Enterprise — versions 6.0, 6.1.0

Weakness classification (CWE)

References

vuldb.com/vuln/358201 (vdb-entry)
vuldb.com/vuln/358201/cti (signature, permissions-required)
vuldb.com/submit/789924 (third-party-advisory)
github.com/cailiujia/CVE (exploit)

Frequently asked questions

What is CVE-2026-6564?: CVE-2026-6564 is a medium-severity vulnerability in Emq Emqx Enterprise, classified under Incorrect Privilege Assignment. CVSS score: 4.3/10. Published 2026-04-19.
How severe is CVE-2026-6564?: Medium severity. CVSS v3 base score is 4.3 out of 10.