CVE-2021-43931

The authentication algorithm of the WebHMI portal is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

• CWE-287

• https://us-cert.cisa.gov/ics/advisories/icsa-21-336-03Patch, Third Party Advisory, US Government Resource
• https://us-cert.cisa.gov/ics/advisories/icsa-21-336-03Patch, Third Party Advisory, US Government Resource

Published

Dec 6, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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