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Vulnerability record · CVE-2012-3037 · published 25 September 2012

CVE-2012-3037: Siemens simatic s7-1200 firmware improper certificate validation vulnerability

Siemens · Simatic S7 1200 Firmware

The Siemens SIMATIC S7-1200 2.x PLC does not properly protect the private key of the SIMATIC CONTROLLER Certification Authority certificate, which allows remote attackers to spoof the S7-1200 web server by using this key to create a forged certificate.

4.3 CVSS 2.0 Medium EPSS 1.5% · top 27.0% CWE-295 · Improper certificate validation
4.3CVSS 2.0 base score
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

The Siemens SIMATIC S7-1200 2.x PLC does not properly protect the private key of the SIMATIC CONTROLLER Certification Authority certificate, which allows remote attackers to spoof the S7-1200 web server by using this key to create a forged certificate.

AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

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

References

LinkTags
http://en.securitylab.ru/lab/PT-2012-48 Third Party Advisory
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-240718.pdf Broken LinkVendor Advisory
http://www.us-cert.gov/control_systems/pdf/ICSA-12-263-01.pdf Broken LinkThird Party AdvisoryUS Government Resource
http://en.securitylab.ru/lab/PT-2012-48 Third Party Advisory
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-240718.pdf Broken LinkVendor Advisory
http://www.us-cert.gov/control_systems/pdf/ICSA-12-263-01.pdf Broken LinkThird Party AdvisoryUS Government Resource

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Related vulnerabilities

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

7.8CVE-2013-0700Siemens simatic s7-1200 firmware vulnerabilitySiemens SIMATIC S7-1200 PLCs 2.x and 3.x allow remote attackers to cause a denial of service (defect-mode transition and control outage) via crafted …EPSS 2.4%7.8CVE-2013-2780Siemens simatic s7-1200 firmware vulnerabilitySiemens SIMATIC S7-1200 PLCs 2.x and 3.x allow remote attackers to cause a denial of service (defect-mode transition and control outage) via crafted …EPSS 2.4%7.5CVE-2021-40365Siemens simatic s7-plcsim advanced firmware improper input validation vulnerabilityAffected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of ser…EPSS 0.90%7.5CVE-2021-37204Siemens simatic drive controller cpu 1504d tf firmware vulnerabilityA vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC Drive Controller family (All versions >= V2.9…EPSS 2.2%7.5CVE-2021-37205Siemens simatic drive controller cpu 1504d tf firmware memory leak vulnerabilityA vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP…EPSS 1.6%7.5CVE-2021-37185Siemens simatic drive controller cpu 1504d tf firmware vulnerabilityA vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP…EPSS 2.1%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-2019-10943Siemens simatic et 200sp open controller cpu 1515sp pc firmware insufficient verification of data authenticity vulnerabilityA vulnerability has been identified in SIMATIC Drive Controller family (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS v…EPSS 0.95%

Source: NIST National Vulnerability Database (record CVE-2012-3037), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.