CVE-2021-43931
CVE-2021-43931 is a critical-severity vulnerability in Webhmi Webhmi Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Webhmi Webhmi Firmware
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2021-43931?
- CVE-2021-43931 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-43931 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-43931?
- CVE-2021-43931 affects Webhmi Webhmi Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-43931?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-43931 published?
- CVE-2021-43931 was published on 2021-12-06 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:webhmi:webhmi_firmware:*:*:*:*:*:*:*:*
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