CVE-2021-43936
CRITICALCVSS 9.8/10EPSS 35.80%
Last modified
CVE-2021-43936 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 35.80% chance of exploitation in the next 30 days.
Description
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.
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
- http://packetstormsecurity.com/files/165252/WebHMI-4.0-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://us-cert.cisa.gov/ics/advisories/icsa-21-336-03Patch, Third Party Advisory, US Government Resource
- http://packetstormsecurity.com/files/165252/WebHMI-4.0-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- 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-2021-43936?
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.
How severe is CVE-2021-43936?
CVE-2021-43936 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 35.80% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43936?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-43936?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST