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Vulnerability record · CVE-2014-2255 · published 16 March 2014

CVE-2014-2255: Siemens simatic s7-1500 cpu firmware vulnerability

Siemens · Simatic S7 1500 Cpu Firmware

Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted HTTP packets.

7.8 CVSS 2.0 High EPSS 4.5% · top 8.9%
7.8CVSS 2.0 base score
4.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Siemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via crafted HTTP packets.

AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 PatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf
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 PatchVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-456423.pdf

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.3CVE-2014-2251Siemens simatic s7-1500 cpu firmware vulnerabilityThe 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 ea…EPSS 2.7%7.8CVE-2014-2257Siemens simatic s7-1500 cpu firmware vulnerabilitySiemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via c…EPSS 3.5%7.8CVE-2014-2259Siemens simatic s7-1500 cpu firmware vulnerabilitySiemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via c…EPSS 4.5%7.5CVE-2022-25622Siemens simatic cfu diq firmware uncontrolled resource consumption vulnerabilityThe PROFINET (PNIO) stack, when integrated with the Interniche IP stack, improperly handles internal resources for TCP segments where the minimum TCP…EPSS 0.88%7.5CVE-2019-10936Siemens dk standard ethernet controller firmware uncontrolled resource consumption vulnerabilityAffected devices improperly handle large amounts of specially crafted UDP packets. This could allow an unauthenticated remote attacker to trigger a d…EPSS 2.1%7.5CVE-2016-2200Siemens simatic s7-1500 cpu firmware improper input validation vulnerabilitySiemens SIMATIC S7-1500 CPU devices before 1.8.3 allow remote attackers to cause a denial of service (STOP mode transition) via crafted packets on TC…EPSS 6.4%7.1CVE-2014-5074Siemens simatic s7-1500 cpu firmware vulnerabilitySiemens SIMATIC S7-1500 CPU devices with firmware before 1.6 allow remote attackers to cause a denial of service (device restart and STOP transition)…EPSS 9.7%6.1CVE-2014-2253Siemens simatic s7-1500 cpu firmware vulnerabilitySiemens SIMATIC S7-1500 CPU PLC devices with firmware before 1.5.0 allow remote attackers to cause a denial of service (defect-mode transition) via c…EPSS 1.0%

Source: NIST National Vulnerability Database (record CVE-2014-2255), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.