The random-number generator on Siemens SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors, a different vulnerability than CVE-2014-2251
Published Mar 22, 2014
8.3
HIGHCVSS 2.0
EPSS 3.16%
Description
The random-number generator on Siemens SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 does not have sufficient entropy, which makes it easier for remote attackers to defeat cryptographic protection mechanisms and hijack sessions via unspecified vectors, a different vulnerability than CVE-2014-2251.
Affected products
No data.
- ≤ 3.0.2
- 3.0
- n/a
- n/a
- n/a
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.16% (0.03156) | 87.52th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.13% (0.03130) | 86.15th | v5 (v2026.06.15) |
| May 9, 2026 | 2.25% (0.02249) | 84.70th | v4 (v2025.03.14) |
| Apr 27, 2025 | 0.89% (0.00889) | 74.24th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.92% (0.01923) | 81.72th | v4 (v2025.03.14) |
| Mar 29, 2025 | 3.49% (0.03492) | 79.07th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.92% (0.01923) | 82.15th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.29% (0.00288) | 69.72th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.29% (0.00288) | 68.00th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.29% (0.00288) | 63.91th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (3)
- http://ics-cert.us-cert.gov/advisories/ICSA-14-079-02 x_refsource_MISCUS Government Resource
- http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-654382.pdf x_refsource_CONFIRMVendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-654382.pdf x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| http://ics-cert.us-cert.gov/advisories/ICSA-14-079-02 | x_refsource_MISCUS Government Resource | |
| http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-654382.pdf | x_refsource_CONFIRMVendor Advisory | |
| https://cert-portal.siemens.com/productcert/pdf/ssa-654382.pdf | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.