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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
icscertCNA
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 45%
VendorProductVersion
webhmiwebhmi_firmware
𝑥
< 4.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://us-cert.cisa.gov/ics/advisories/icsa-21-336-03
https://us-cert.cisa.gov/ics/advisories/icsa-21-336-03