Hard-coded credentials in Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C
Priority MEDIUM 40CWE-798Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-798.
Summary
A vulnerability has been identified in CP-8000 MASTER MODULE WITH I/O -25/+70°C (All versions < V16.20), CP-8000 MASTER MODULE WITH I/O -40/+70°C (All versions < V16.20), CP-8021 MASTER MODULE (All versions < V16.20), CP-8022 MASTER MODULE WITH GPRS (All versions < V16.20). An undocumented debug port uses hard-coded default credentials. If this port is enabled by a privileged user, an attacker aware of the credentials could access an administrative debug shell on the affected device.
Why it matters now
EPSS 0.00936 61st percentileScored 2026-11-07
Fix Fixed CP-8000 MASTER MODULE WITH I/O -25/+70°C (Siemens): V16.20CP-8000 MASTER MODULE WITH I/O -40/+70°C (Siemens): V16.20+2 more products
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | CP-8000 MASTER MODULE WITH I/O -25/+70°C | before V16.20 | V16.20 | Patch available | CNA |
| Siemens | CP-8000 MASTER MODULE WITH I/O -40/+70°C | before V16.20 | V16.20 | Patch available | CNA |
| Siemens | CP-8021 MASTER MODULE | before V16.20 | V16.20 | Patch available | CNA |
| Siemens | CP-8022 MASTER MODULE WITH GPRS | before V16.20 | V16.20 | Patch available | CNA |
- CP-8000 MASTER MODULE WITH I/O -25/+70°C VendorSiemens Affected before V16.20 Fixed in V16.20 Patch available CNA
- CP-8000 MASTER MODULE WITH I/O -40/+70°C VendorSiemens Affected before V16.20 Fixed in V16.20 Patch available CNA
- CP-8021 MASTER MODULE VendorSiemens Affected before V16.20 Fixed in V16.20 Patch available CNA
- CP-8022 MASTER MODULE WITH GPRS VendorSiemens Affected before V16.20 Fixed in V16.20 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:cp-8000_master_module_with_i\/o_-25\/\+70_firmware:*:*:*:*:*:*:*:* | before 16.20 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:cp-8000_master_module_with_i\/o_-25\/\+70:*:*:*:*:*:*:*:* | all versions | Running on | Siemens |
| cpe:2.3:o:siemens:cp-8000_master_module_with_i\/o_-40\/\+70_firmware:*:*:*:*:*:*:*:* | before 16.20 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:cp-8000_master_module_with_i\/o_-40\/\+70:*:*:*:*:*:*:*:* | all versions | Running on | Siemens |
| cpe:2.3:o:siemens:cp-8021_master_module_firmware:*:*:*:*:*:*:*:* | before 16.20 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:cp-8021_master_module:*:*:*:*:*:*:*:* | all versions | Running on | Siemens |
| cpe:2.3:o:siemens:cp-8022_master_module_with_gprs_firmware:*:*:*:*:*:*:*:* | before 16.20 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:cp-8022_master_module_with_gprs:*:*:*:*:*:*:*:* | all versions | Running on | Siemens |
- cpe:2.3:o:siemens:cp-8000_master_module_with_i\/o_-25\/\+70_firmware:*:*:*:*:*:*:*:* Versions before 16.20 Vulnerable ·Siemens
- cpe:2.3:h:siemens:cp-8000_master_module_with_i\/o_-25\/\+70:*:*:*:*:*:*:*:* Versions all versions Running on ·Siemens
- cpe:2.3:o:siemens:cp-8000_master_module_with_i\/o_-40\/\+70_firmware:*:*:*:*:*:*:*:* Versions before 16.20 Vulnerable ·Siemens
- cpe:2.3:h:siemens:cp-8000_master_module_with_i\/o_-40\/\+70:*:*:*:*:*:*:*:* Versions all versions Running on ·Siemens
- cpe:2.3:o:siemens:cp-8021_master_module_firmware:*:*:*:*:*:*:*:* Versions before 16.20 Vulnerable ·Siemens
- cpe:2.3:h:siemens:cp-8021_master_module:*:*:*:*:*:*:*:* Versions all versions Running on ·Siemens
- cpe:2.3:o:siemens:cp-8022_master_module_with_gprs_firmware:*:*:*:*:*:*:*:* Versions before 16.20 Vulnerable ·Siemens
- cpe:2.3:h:siemens:cp-8022_master_module_with_gprs:*:*:*:*:*:*:*:* Versions all versions Running on ·Siemens
Remediation
- Fix · CNA CP-8000 MASTER MODULE WITH I/O -25/+70°C (Siemens) Fixed in V16.20
- Fix · CNA CP-8000 MASTER MODULE WITH I/O -40/+70°C (Siemens) Fixed in V16.20
- Fix · CNA CP-8021 MASTER MODULE (Siemens) Fixed in V16.20
- Fix · CNA CP-8022 MASTER MODULE WITH GPRS (Siemens) Fixed in V16.20
Timeline
- 2026-10-02 Threatist record created from CVE-2021-45033
- 2026-10-03 Alias added: GHSA-q8fx-9mjf-3j27
References
More Siemens Cp-8000 Master Module With I/o -25/+70 Firmware vulnerabilities
- TI-2021-20384 Improper access control in Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C CVSS 3.1HIGH 7.5
- TI-2021-21145 Improper access control in Siemens CP-8000 MASTER MODULE WITH I/O -25/+70°C CVSS 3.1HIGH 7.5
Sources
- CVE-2021-45033 · CVE Program
- CVE-2021-45033 · NVD
- FIRST EPSS
- GHSA-q8fx-9mjf-3j27 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences