CVE-2021-43931 json
Distributed Data Systems WebHM
published 2021-12-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30793
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 74%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-21-336-03 updated cvss 9.8
Distributed Data Systems WebHMI
-
Distributed Data Systems WebHMI < 4.1affected: mitigation “Upgrading the platform software to the latest release, Version 4.1”
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Exploit prediction
1.48% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- Distributed Data Systems WebHMI
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
us-cert.cisa.gov
/ics/advisories/icsa-21-336-03
patch, third-party-advisory, us-government-resource
Sources
- CVE List CVE-2021-43931
- NVD CVE-2021-43931
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.