CVE-2021-43931
CRITICALCVSS 9.8/10EPSS 1.39%
Last modified
CVE-2021-43931 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.39% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Webhmi | Webhmi Firmware | < 4.1 |
References
- 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
Timeline
- Published
- Last Modified
- Status
- Modified
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 score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43931?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-43931?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST