Path traversal in Siemens CP-8031 MASTER MODULE
Key facts
- Attack vector
- Network
- Privileges required
- Low
- 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 · NVD. Fix status from CNA.
Summary
A vulnerability has been identified in CP-8031 MASTER MODULE (All versions < CPCI85 V05.11), CP-8050 MASTER MODULE (All versions < CPCI85 V05.11). The web server of affected devices fails to properly sanitize user input for the /sicweb-ajax/tmproot/ endpoint. This could allow an authenticated remote attacker to traverse directories on the system and download arbitrary files. By exploring active session IDs, the vulnerability could potentially be leveraged to escalate privileges to the administrator role.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | CP-8031 MASTER MODULE | All versions < CPCI85 V05.11 | — | No fix listed | CNA |
| Siemens | CP-8050 MASTER MODULE | All versions < CPCI85 V05.11 | — | No fix listed | CNA |
- CP-8031 MASTER MODULE VendorSiemens Affected All versions < CPCI85 V05.11 Fixed in — No fix listed CNA
- CP-8050 MASTER MODULE VendorSiemens Affected All versions < CPCI85 V05.11 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-2023-42796
- 2026-10-03 Alias added: GHSA-fvx8-3v89-2x6h
References
More Siemens Cp-8031 Firmware vulnerabilities
- TI-2023-13029 Command injection in Siemens CP-8031 MASTER MODULE CVSS 3.1CRITICAL 9.8
- TI-2023-18243 Hard-coded credentials in Siemens CP-8031 MASTER MODULE CVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-42796 · CVE Program
- CVE-2023-42796 · NVD
- FIRST EPSS
- GHSA-fvx8-3v89-2x6h · GitHub Advisory Database · CC BY 4.0
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