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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.

PUBLISHED Reserved 2026-05-19 | Published 2026-05-28 | Updated 2026-05-28 | Assigner CyberDanube




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

Problem types

CWE-287 Improper Authentication

Product status

Default status
affected

Any version
affected

Credits

S. Eisenreich-Dietz (CyberDanube) finder

References

cyberdanube.com/...ulnerabilities-in-mennekes-amtron-series/ exploit

cyberdanube.com/...ulnerabilities-in-mennekes-amtron-series/

cve.org (CVE-2026-8979)

nvd.nist.gov (CVE-2026-8979)

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