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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 35.8%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 35.80% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 13 December 2021
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- webhmi/webhmi firmware
- Source
- ics-cert@hq.dhs.gov
EPSS 35.8% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.