CVE-2026-8979

Authentication Bypass

Published May 28, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Mennekes
Mennekes amtron
Vendors & Products Mennekes
Mennekes amtron
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Authentication Bypass
Weaknesses CWE-287
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS: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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
CyberDanube
Published
Updated
May 28, 2026, 2:21 PM
Reserved
May 19, 2026, 1:11 PM
Status
Deferred
Published
May 28, 2026, 2:16 PM
Modified
Oct 26, 2026, 11:10 AM