Vulnerability identifier: #VU58506

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-43931

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WebHMI
Server applications / SCADA systems

Vendor:

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to a separate weakness primary to the authentication error. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

---

External links
http://ics-cert.us-cert.gov/advisories/icsa-21-336-03

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.