Arbitrary file upload in Distributed Data Systems Webhmi
CVE-2021-43936
The software allows the attacker to upload or transfer files of dangerous types to the WebHMI portal, that may be automatically processed within the product's environment or lead to arbitrary code execution.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.358 (98.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.358 · newest: 0.358 · change: 0.000
Affected products
- Distributed Data Systems Webhmi — versions 4.1
- Webhmi
- Webhmi Firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- us-cert.cisa.gov/ics/advisories/icsa-21-336-03 (US Government Resource, Patch, Third Party Advisory)
- packetstormsecurity.com/files/165252/WebHMI-4.0-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-43936?
- CVE-2021-43936 is a critical-severity vulnerability in Distributed Data Systems Webhmi, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 10.0/10. Published 2021-12-06.
- How severe is CVE-2021-43936?
- Critical severity. CVSS v3 base score is 10.0 out of 10.
- Is CVE-2021-43936 known to be exploited?
- 12 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.