CVE-2014-2251

Name: CVE-2014-2251
Creator: NVD / NIST
Published: 2014-03-16T14:06:45.867+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.74%

Last modified Jun 17, 2026

CVE-2014-2251 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.74% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.74%

84.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Siemens	Simatic S7-1500 Cpu Firmware	<= 1.1.2
Siemens	Simatic S7-1500 Cpu Firmware	1.0.1
Siemens	Simatic S7-1500 Cpu Firmware	1.1.0
Siemens	Simatic S7-1500 Cpu Firmware	1.1.1

References

http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01US Government Resource
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01US Government Resource
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf

Timeline

Published: Mar 16, 2014
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2014-2251?

How severe is CVE-2014-2251?

Severity scoring for CVE-2014-2251 is pending analysis. The EPSS model estimates a 2.74% probability of exploitation in the next 30 days.

How do I fix CVE-2014-2251?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2014-2251?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST