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TI-2023-16792 Aliases CVE-2023-33920GHSA-mqj9-w9ch-6xmr

Hard-coded credentials in Siemens CP-8031 MASTER MODULE

Priority LOW 32CWE-798Published · Updated

Key facts

Attack vector
Physical
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), CP-8050 MASTER MODULE (All versions < CPCI85 V05). The affected devices contain the hash of the root password in a hard-coded form, which could be exploited for UART console login to the device. An attacker with direct physical access could exploit this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00364 30th 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
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensCP-8031 MASTER MODULEAll versions < CPCI85 V05—No fix listedCNA
SiemensCP-8050 MASTER MODULEAll versions < CPCI85 V05—No fix listedCNA
  • CP-8031 MASTER MODULE VendorSiemens Affected All versions < CPCI85 V05 Fixed in — No fix listed CNA
  • CP-8050 MASTER MODULE VendorSiemens Affected All versions < CPCI85 V05 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:siemens:cpci85_firmware:*:*:*:*:*:*:*:*before v05VulnerableSiemens
cpe:2.3:h:siemens:cp-8050_master_module:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
cpe:2.3:h:siemens:cp-8031_master_module:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:o:siemens:cpci85_firmware:*:*:*:*:*:*:*:* Versions before v05 Vulnerable ·Siemens
  • cpe:2.3:h:siemens:cp-8050_master_module:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
  • cpe:2.3:h:siemens:cp-8031_master_module:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-33920
  2. 2026-10-03 Alias added: GHSA-mqj9-w9ch-6xmr

References

Patch 1

Other 2

  • TI-2023-16793 A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05)… CVSS 3.1MEDIUM 6.8
  • TI-2023-16791 Command injection in Siemens CP-8031 MASTER MODULE CVSS 3.1HIGH 7.2

Sources

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