CVE-2026-8979CWE-287

Authentication Bypass

Critical · published May 28, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
53.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · 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
EPSS
0.00725 · 53.5th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-05-28T13:05Z
EPSS history
Timeline
  • 28 MAY 13:05Z
    Authentication Bypass
    cvelistv5