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CVE-2021-23845

B426 Web Configuration Authentication Bypass

HIGH
8.8
CVSS Score
Published: June 18, 2021 at 01:38 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
8 products affected across 1 vendorB426 FirmwareB426-m FirmwareB426-cn Firmware

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Severity
HIGH8.8
Exploit prediction
EPSS 0.8%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

B426-cn Firmware· Bosch
95%
v < 03.08
Affected range stops below 03.08, so it looks safe — our inference, not a vendor statement
bosch-b426-cn (same device)
B426 Firmware· Bosch
95%
v < 03.08
Affected range stops below 03.08, so it looks safe — our inference, not a vendor statement
bosch-b426 (same device)
B426-m Firmware· Bosch
95%
v < 03.10
Affected range stops below 03.10, so it looks safe — our inference, not a vendor statement
bosch-b426-m (same device)
B429-cn Firmware· Bosch
95%
v < 03.08
Affected range stops below 03.08, so it looks safe — our inference, not a vendor statement
bosch-b429-cn (same device)
B426-CN· Bosch
60%
v < 03.08
Affected range stops below 03.08, so it looks safe — our inference, not a vendor statement
B429-CN· Bosch
60%
v < 03.08
Affected range stops below 03.08, so it looks safe — our inference, not a vendor statement
B426· Boschdevice
80%
All versions
B426-M· Boschdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://psirt.bosch.com/security-advisories/bosch-sa-196933-bt.html

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-284NVD-CWE-noinfo

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