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TI-2023-16793 Aliases CVE-2023-33921GHSA-hpw2-7w94-ff35

A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05)…

Priority HIGH 65CWE-749Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

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 an exposed UART console login interface. An attacker with direct physical access could try to bruteforce or crack the root password to login to the device.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd 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
Poc
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-2023-33921
  2. 2026-10-03 Alias added: GHSA-hpw2-7w94-ff35

References

Patch 1

Other 2

  • TI-2023-16791 Command injection in Siemens CP-8031 MASTER MODULE CVSS 3.1HIGH 7.2
  • TI-2023-16792 Hard-coded credentials in Siemens CP-8031 MASTER MODULE CVSS 3.1MEDIUM 6.8

Sources

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