CVE-2021-23843: Lack of authentication mechanisms on the device

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-19 · updated 2026-06-17
Weakness: CWE-306

Description

The Bosch software tools AccessIPConfig.exe and AmcIpConfig.exe are used to configure certains settings in AMC2 devices. The tool allows putting a password protection on configured devices to restrict access to the configuration of an AMC2. An attacker can circumvent this protection and make unauthorized changes to configuration data on the device. An attacker can exploit this vulnerability to manipulate the device\'s configuration or make it unresponsive in the local network. The attacker needs to have access to the local network, typically even the same subnet.

Affected products

Bosch Access Management System: 3.0
Bosch Access Professional Edition: through 3.8.0
Bosch Amc2 Firmware: all versions
Bosch Building Integration System: before 4.9.1 — fixed in 4.9.1

How to fix

Upgrade to a fixed version: Bosch Building Integration System 4.9.1. Check the vendor advisory for mitigations.

References

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