The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware…
Priority MEDIUM 41Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors.
Why it matters now
EPSS 0.02744 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:* | up to 1.1.2 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.0.1:*:*:*:*:*:*:* | 1.0.1 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.1.0:*:*:*:*:*:*:* | 1.1.0 | Vulnerable | Siemens |
| cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.1.1:*:*:*:*:*:*:* | 1.1.1 | Vulnerable | Siemens |
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:* Versions up to 1.1.2 Vulnerable ·Siemens
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.0.1:*:*:*:*:*:*:* Versions 1.0.1 Vulnerable ·Siemens
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.1.0:*:*:*:*:*:*:* Versions 1.1.0 Vulnerable ·Siemens
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.1.1:*:*:*:*:*:*:* Versions 1.1.1 Vulnerable ·Siemens
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2014-2251
- 2026-10-03 Alias added: GHSA-gc2g-5cgv-c5vh
References
More Siemens Simatic S7-1500 Cpu Firmware vulnerabilities
- TI-2019-08156 Uncontrolled resource consumption in Siemens Development/Evaluation Kits for PROFINET IO… CVSS 3.1HIGH 7.5
- TI-2014-04151 Siemens SIMATIC S7-1500 CPU devices with firmware before 1.6 allow remote attackers to… CVSS 2.0HIGH 7.1
- TI-2016-02009 Siemens SIMATIC S7-1500 CPU devices before 1.8.3 allow remote attackers to cause a denial… CVSS 3.0HIGH 7.5
- TI-2022-09211 Uncontrolled resource consumption in Siemens SIMATIC CFU DIQ CVSS 3.1HIGH 7.5
- TI-2014-01791 Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers… CVSS 2.0HIGH 7.8
- TI-2014-01787 Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers… CVSS 2.0HIGH 7.8
Sources
- CVE-2014-2251 · CVE Program
- CVE-2014-2251 · NVD
- FIRST EPSS
- GHSA-gc2g-5cgv-c5vh · 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