TI-2023-18243 Aliases CVE-2023-36380 GHSA-mmpj-f59m-vxp4

Hard-coded credentials in Siemens CP-8031 MASTER MODULE

MEDIUM 49CWE-798Published 2023-10-10 · Updated 2025-02-27

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-798.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00408 35th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Siemens	CP-8031 MASTER MODULE	All versions < CPCI85 V05.11 (only with activated debug support)	—	No fix listed	CNA
Siemens	CP-8050 MASTER MODULE	All versions < CPCI85 V05.11 (only with activated debug support)	—	No fix listed	CNA

CP-8031 MASTER MODULE VendorSiemens Affected All versions < CPCI85 V05.11 (only with activated debug support) Fixed in — No fix listed CNA
CP-8050 MASTER MODULE VendorSiemens Affected All versions < CPCI85 V05.11 (only with activated debug support) Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:siemens:cp-8050_firmware:::::cpci85:::*	before 05.11	Vulnerable	Siemens
cpe:2.3:h:siemens:cp-8050:-:::::::*	not specified by NVD	Running on	Siemens
cpe:2.3:o:siemens:cp-8031_firmware:::::cpci85:::*	before 05.11	Vulnerable	Siemens
cpe:2.3:h:siemens:cp-8031:-:::::::*	not specified by NVD	Running on	Siemens

cpe:2.3:o:siemens:cp-8050_firmware:*:*:*:*:cpci85:*:*:* Versions before 05.11 Vulnerable ·Siemens
cpe:2.3:h:siemens:cp-8050:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
cpe:2.3:o:siemens:cp-8031_firmware:*:*:*:*:cpci85:*:*:* Versions before 05.11 Vulnerable ·Siemens
cpe:2.3:h:siemens:cp-8031:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-36380
2026-10-03 Alias added: GHSA-mmpj-f59m-vxp4

References

Patch 1

https://cert-portal.siemens.com/productcert/pdf/ssa-134651.pdf

TI-2023-13029 Command injection in Siemens CP-8031 MASTER MODULE CVSS 3.1CRITICAL 9.8
TI-2023-22887 Path traversal in Siemens CP-8031 MASTER MODULE CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences