Incorrect Implementation of Authentication Algorithm in KUNBUS RevPi Webstatus

1) Incorrect Implementation of Authentication Algorithm

EUVDB-ID: #VU112894

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-41646

CWE-ID: CWE-303 - Incorrect Implementation of Authentication Algorithm

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to implicit type conversion within the password check. A remote attacker can bypass authentication on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Revolution Pi Webstatus: - - 2.4.5

Revolution Pi OS Bullseye: All versions

CPE2.3

• cpe:2.3:a:kunbus:revolution_pi_webstatus:*:*:*:*:*:*:*:*
• cpe:2.3:a:kunbus:revolution_pi_webstatus:2.4.5:*:*:*:*:*:*:*
• cpe:2.3:a:kunbus:revolution_pi_os_bullseye:*:*:*:*:*:*:*:*

External links

https://psirt.kunbus.com/.well-known/csaf/white/2025/kunbus-2025-0000003.json
https://www.kunbus.com/en/productsecurity/Kunbus-2025-0000003
https://www.cisa.gov/news-events/ics-advisories/icsa-25-191-09

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.