How severe is CVE-2026-8979?

CVE-2026-8979 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2026-8979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8979?

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-2026-8979 have an EU (EUVD) identifier?

Yes. CVE-2026-8979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32896.

When was CVE-2026-8979 published?

CVE-2026-8979 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-8979

CVE-2026-8979 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-287.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32896
Weakness: CWE-287
Published: 2026-05-28
Last modified: 2026-06-17

Description

The Mennekes Amtron series (firmware versions ≤ 5.22.3) is vulnerable to an authentication bypass. An unauthenticated remote attacker can change the password of the user account via a crafted POST request to the /operator/operator endpoint.

Frequently asked questions

What is CVE-2026-8979?: The Mennekes Amtron series (firmware versions ≤ 5.22.3) is vulnerable to an authentication bypass. An unauthenticated remote attacker can change the password of the user account via a crafted POST request to the /operator/operator endpoint.
How severe is CVE-2026-8979?: CVE-2026-8979 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2026-8979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-8979?: 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-2026-8979 have an EU (EUVD) identifier?: Yes. CVE-2026-8979 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32896.
When was CVE-2026-8979 published?: CVE-2026-8979 was published on 2026-05-28 and last updated on 2026-06-17.

References

https://cyberdanube.com/security-research/multiple-vulnerabilities-in-mennekes-amtron-series/

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