Is CVE-2014-2256 being actively exploited?

CVE-2014-2256 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2014-2256?

CVE-2014-2256 has a CVSS 2.0 base score of 7.8 (HIGH).

CVE-2014-2256

HIGH · CVSS 7.8EPSS 3.7%EU EUVD

Siemens SIMATIC S7-1200 CPU PLC devices with firmware before 4.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted ISO-TSAP packets, a different vulnerability than CVE-2014-2257.

Key facts

CVSS score: 7.8 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Weakness (CWE): CWE-399
EPSS score: 3.7% (90th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2014-2295)
Published: March 24, 2014
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2014-2295 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

siemens / simatic s7 cpu 1200 firmware
siemens / simatic s7 cpu 1200 firmware
siemens / simatic s7 cpu 1212c
siemens / simatic s7 cpu 1214c
siemens / simatic s7 cpu 1215c
siemens / simatic s7 cpu 1217c
siemens / simatic s7 cpu-1211c

References

http://ics-cert.us-cert.gov/advisories/ICSA-14-079-02(US Government Resource)
http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-654382.pdf(Vendor Advisory)
https://cert-portal.siemens.com/productcert/pdf/ssa-654382.pdf

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

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