CVE-2014-2251
CVE-2014-2251 is a high-severity vulnerability in Siemens Simatic S7-1500 Cpu Firmware with a CVSS 2.0 base score of 8.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 8.3)
- EPSS exploit prediction: 3% (84th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Siemens Simatic S7-1500 Cpu Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2014-2251?
- 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.
- How severe is CVE-2014-2251?
- CVE-2014-2251 has a CVSS 2.0 base score of 8.3, rated high severity.
- Is CVE-2014-2251 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2014-2251?
- CVE-2014-2251 primarily affects Siemens Simatic S7-1500 Cpu Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2014-2251?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2014-2251 published?
- CVE-2014-2251 was published on 2014-03-16 and last updated on 2026-06-17.
References
- http://ics-cert.us-cert.gov/advisories/ICSA-14-073-01
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-456423.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
Affected products (4)
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.0.1:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.1.0:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.1.1:*:*:*:*:*:*:*
More vulnerabilities in Siemens Simatic S7-1500 Cpu Firmware
- CVE-2014-2259 — High (CVSS 7.8): Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service…
- CVE-2014-2257 — High (CVSS 7.8): Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service…
- CVE-2014-2255 — High (CVSS 7.8): Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service…
- CVE-2019-10936 — High (CVSS 7.5): Affected devices improperly handle large amounts of specially crafted UDP packets. This could allow an…
- CVE-2016-2200 — High (CVSS 7.5): Siemens SIMATIC S7-1500 CPU devices before 1.8.3 allow remote attackers to cause a denial of service (STOP mode…
- CVE-2014-5074 — High (CVSS 7.1): Siemens SIMATIC S7-1500 CPU devices with firmware before 1.6 allow remote attackers to cause a denial of service…