CVE-2021-23842
lowpriority · track · 28OT risk · elevatedEPSS 0.001 · 4 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.6–7.1
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
- bosch access professional edition≤ 3.8.0nvdUScpe:2.3:a:bosch:access_professional_edition:*:*:*:*:*:*:*:*
- bosch building integration system< 4.9.1nvdUScpe:2.3:a:bosch:building_integration_system:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
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