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Critical 9.3Published May 28, 2026
CVE-2026-8979Authentication Bypass
Updated under an hour ago ()
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It affects Mennekes Amtron. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.3 CRITICAL (v4.0, CNA)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
- Weakness (CWE)
- CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- CyberDanube
- NVD analysis
- Deferred
- Record last updated
- May 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Mennekes Amtron mennekes:amtron (from the name) | through 5.22.3; fixed at 5.33.11-21500 | CNA record |
References
- https://cyberdanube.com/security-research/multiple-vulnerabilities-in-mennekes-amtron-series/
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.