How severe is CVE-2026-6564?

CVE-2026-6564 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-6564 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-6564?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-6564 have an EU (EUVD) identifier?

Yes. CVE-2026-6564 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23692.

When was CVE-2026-6564 published?

CVE-2026-6564 was published on 2026-04-19 and last updated on 2026-06-17.

CVE-2026-6564

CVE-2026-6564 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-266.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
CVSS v4: 2.1
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23692
Weakness: CWE-266
Published: 2026-04-19
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-6564?: CVE-2026-6564 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-6564 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-6564?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-6564 have an EU (EUVD) identifier?: Yes. CVE-2026-6564 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23692.
When was CVE-2026-6564 published?: CVE-2026-6564 was published on 2026-04-19 and last updated on 2026-06-17.

References

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