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NVD Vulnerability Details :

CVE-2026-8979

Received

Source-office@cyberdanube.com

Published At-28 May, 2026 | 14:16

Updated At-28 May, 2026 | 16:16

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	9.3	CRITICAL	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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Type: Secondary

Version: 4.0

Base score: 9.3

Base severity: CRITICAL

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE ID	Type	Source
CWE-287	Secondary	office@cyberdanube.com

CWE ID: CWE-287

Type: Secondary

Source: office@cyberdanube.com

References

Hyperlink	Source	Resource
https://cyberdanube.com/security-research/multiple-vulnerabilities-in-mennekes-amtron-series/	office@cyberdanube.com	N/A
https://cyberdanube.com/security-research/multiple-vulnerabilities-in-mennekes-amtron-series/	134c704f-9b21-4f2e-91b3-4a467353bcc0	N/A

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

Source: office@cyberdanube.com

Resource: N/A

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Resource: N/A

CISA Catalog

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Change History