CVE-2014-2251
The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2014-2251- CVSS 2.0
- 8.3 High
AV:N/AC:M/Au:N/C:P/I:P/A:C - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2014-2251- Updated
- 2026-11-02
EUVDEUVD-2014-2290 No score
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.
- Record
EUVD-2014-2290- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gc2g-5cgv-c5vh No score
The random-number generator on Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0...
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.
- Record
GHSA-gc2g-5cgv-c5vh- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2014-2251 is a high vulnerability (CVSS 8.3) in Siemens Simatic S7-1500 Cpu Firmware, published March 16, 2014. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.74%, the 86th percentile. No source names a fixed version.