CVE-2021-23859: Denial of Service and Authentication Bypass Vulnerability in multiple Bosch products

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-08 · updated 2026-06-17
Weakness: CWE-703

Description

An unauthenticated attacker is able to send a special HTTP request, that causes a service to crash. In case of a standalone VRM or BVMS with VRM installation this crash also opens the possibility to send further unauthenticated commands to the service. On some products the interface is only local accessible lowering the CVSS base score. For a list of modified CVSS scores, please see the official Bosch Advisory Appendix chapter Modified CVSS Scores for CVE-2021-23859

Affected products

Bosch Access Easy Controller Firmware: through 2.9.1.0
Bosch Access Professional Edition: through 3.8.0
Bosch Video Management System: through 9.0; from 10.0 before 10.0.2; 10.1, 11.0 — fixed in 10.0.2
Bosch Building Integration System: through 4.9
Bosch Video Recording Manager: through 3.81; from 3.82 through 3.82.0057; from 3.83 through 3.83.0021; from 4.0 through 4.00.0070
Bosch Video Recording Manager Exporter: from 2.1 through 2.10.0008

How to fix

Upgrade to a fixed version: Bosch Video Management System 10.0.2. Check the vendor advisory for mitigations.

References

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