Medium severity5.7NVD Advisory· Published Jan 19, 2022· Updated Jun 17, 2026
CVE-2021-23842
CVE-2021-23842
Description
Communication to the AMC2 uses a state-of-the-art cryptographic algorithm for symmetric encryption called Blowfish. An attacker could retrieve the key from the firmware to decrypt network traffic between the AMC2 and the host system. Thus, an attacker can exploit this vulnerability to decrypt and modify network traffic, decrypt and further investigate the device\'s firmware file, and change the device configuration. The attacker needs to have access to the local network, typically even the same subnet.
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Affected products
9- cpe:2.3:a:bosch:access_management_system:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:bosch:access_professional_edition:*:*:*:*:*:*:*:*Range: <=3.8.0
- cpe:2.3:a:bosch:building_integration_system:*:*:*:*:*:*:*:*Range: <4.9.1
- cpe:2.3:o:bosch:amc2_firmware:-:*:*:*:*:*:*:*
- Bosch/AMSv5Range: unspecified
- Bosch/APEv5Range: unspecified
- Bosch/BISv5Range: unspecified
Patches
Vulnerability mechanics
References
1- psirt.bosch.com/security-advisories/BOSCH-SA-940448-BT.htmlnvdMitigationVendor Advisory
News mentions
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