CVE-2021-23845: Bosch b426-Cn Firmware

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.

Affected products

• Bosch b426-Cn Firmware: before 03.08 (fixed in 03.08)
• Bosch b426-M Firmware: before 03.10 (fixed in 03.10)
• Bosch b426 Firmware: before 03.08 (fixed in 03.08)
• Bosch b429-Cn Firmware: before 03.08 (fixed in 03.08)

Published 2021-06-18. Last modified 2026-06-17.