CVE-2014-2251

highpriority · track · 34EPSS 0.027 · 86 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.74% (86th) EPSS

CVSS 8.3 · high

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-22

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationSIMATIC S7-1500 CPU familycisa_csaf_ot
Siemens addresses all these issues in a security advisory that can be found at the following location (http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdf)
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdf

cvss

Technical severity, 0–10. One row per scoring source.

8.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.08.3highAV:N/AC:M/Au:N/C:P/I:P/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 8.5

v2.08.3highAV:N/AC:M/Au:N/C:P/I:P/A:Csecondary · CISA US

v2.07.1highAV:N/AC:M/Au:N/C:P/I:P/A:C/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-331US

affected products (7)

Products and version ranges known to be affected.

Siemens SIMATIC S7-1500 CPU family: <V1.5all versionscisa_csaf_otUS
Siemens SIMATIC S7-1500 CPU family< V1.5cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
siemens simatic s7-1500 cpu firmware≤ 1.1.2nvdUScpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:*
siemens simatic s7-1500 cpu firmware= 1.0.1nvdUScpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:*
siemens simatic s7-1500 cpu firmware= 1.1.0nvdUScpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:*
siemens simatic s7-1500 cpu firmware= 1.1.1nvdUScpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-14-073-01Siemens SIMATIC S7-1500 CPU Firmware Vulnerabilities2014-12-15icsa · cisa_csaf_otUS
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2014-03-16modified 2026-06-17

references (9)

External citations — patches, advisories, analysis.

scry

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