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Vulnerabilities

Vulnerability · CVE-2026-8979

The Mennekes Amtron series (firmware versions ≤ 5.22.3) is vulnerable to an authentication bypass.

Published May 28, 2026 · catalog updated Jun 17, 2026 · The Mennekes Amtron series

Check if you run it

No confirmed exploitation is on record for CVE-2026-8979. EPSS is 0.73%. Act only if a listed version of The Mennekes Amtron series is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The Mennekes Amtron series).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.73%
Remediation
Advisory link
Affected products
See sources for product scope

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.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-8979

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-8979. EPSS is 0.73%. Act only if a listed version of The Mennekes Amtron series is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 0.73%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 28, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-8979

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-8979

    30-day exploitation probability 0.7%

    first.org
  • NIST NVDVulnerability recordCVE-2026-8979

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.