CVE-2023-36380

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-10 · updated 2026-06-17
Weakness: CWE-798

Description

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11 (only with activated debug support)). The affected devices contain a hard-coded ID in the SSH `authorized_keys` configuration file. An attacker with knowledge of the corresponding private key could login to the device via SSH. Only devices with activated debug support are affected.

Affected products

Siemens Cp-8031 Firmware: before 05.11 — fixed in 05.11
Siemens Cp-8050 Firmware: before 05.11 — fixed in 05.11

How to fix

Upgrade to a fixed version: Siemens Cp-8031 Firmware 05.11; Siemens Cp-8050 Firmware 05.11. Check the vendor advisory for mitigations.

References

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