CVE-2021-23845 json
B426 Web Configuration Authentication Bypass
published 2021-06-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-10771
- cvss
- 8.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 58%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Bosch B426 Firmware 03.08
- Bosch B426-CN/B429- CN Firmware 03.08
- Bosch B426-M Firmware 03.10
Exploit prediction
0.84% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.0 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Bosch B426 Firmware
- Bosch B426-CN/B429- CN Firmware
- Bosch B426-M Firmware
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
psirt.bosch.com
/security-advisories/bosch-sa-196933-bt.html
vendor-advisory
Sources
- CVE List CVE-2021-23845
- NVD CVE-2021-23845
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