Is CVE-2014-2251 being actively exploited?

CVE-2014-2251 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2014-2251?

CVE-2014-2251 has a CVSS 2.0 base score of 8.3 (HIGH).

CVE-2014-2251

HIGH · CVSS 8.3EPSS 2.7%EU EUVD

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.

Key facts

CVSS score: 8.3 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:C
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2014-2290)
Published: March 16, 2014
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2014-2290 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

siemens / simatic s7-1500 cpu firmware
siemens / simatic s7-1500 cpu firmware
siemens / simatic s7-1500 cpu firmware
siemens / simatic s7-1500 cpu firmware

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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