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CVE-2012-3037· NVD / CVE Program· CNA icscert

The Siemens SIMATIC S7-1200 2.x PLC does not properly protect the private key of the SIMATIC CONTROLLER Certification Authority certificate,

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.

MediumCVSS 4.3 · v2.0—No exploit No fix recorded
Published
Sep 25, 2012
Updated
Jun 16, 2026
EPSS
1.5% · 73th percentile
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Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.5%

Affected systems

VendorProduct
siemenssimatic s7-1200 firmware
siemenssimatic s7-1200
siemenssimatic s7-1200 cpu 1211c firmware
siemenssimatic s7-1200 cpu 1211c
siemenssimatic s7-1200 cpu 1212c firmware
siemenssimatic s7-1200 cpu 1212c
siemenssimatic s7-1200 cpu 1212fc firmware
siemenssimatic s7-1200 cpu 1212fc
siemenssimatic s7-1200 cpu 1214 fc firmware
siemenssimatic s7-1200 cpu 1214 fc
siemenssimatic s7-1200 cpu 1214c firmware
siemenssimatic s7-1200 cpu 1214c

and 6 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • siemens simatic s7-1200 cpu 1211c firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1212c firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1212fc firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1214 fc firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1214c firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1215 fc firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1215c firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 cpu 1217c firmware2.0.0 and later · before 3.0.0
  • siemens simatic s7-1200 firmware2.0.0 and later · before 3.0.0

Same product

siemens: all records

Other highest-scoring records for the same primary product.

  • CVE-2013-2780Siemens 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
    32Monitor
  • CVE-2013-0700Siemens 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
    32Monitor
  • CVE-2018-13815A vulnerability has been identified in SIMATIC S7-1200 (All versions), SIMATIC S7-1500 (All Versions < V2.6).
    31Monitor
  • CVE-2019-13945A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl.
    27Monitor
  • CVE-2012-3040Cross-site scripting (XSS) vulnerability in the web server on Siemens SIMATIC S7-1200 PLCs 2.x through 3.0.1 allows remote attackers to inje
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    P · data can be read
    Integrity
    none
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    None
    Availability impact
    None

    Weakness class (CWE)

    CWE-295 · Improper Certificate Validation

    CVSS vector

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

    nvd-primary

    Root cause

    A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

    The bug in code

    The whole CWE-295 class

    A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

    Vulnerable

    kotlin
    override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {  // Left empty for the test environment}

    Fixed

    kotlin
    val client = OkHttpClient.Builder()  .certificatePinner(    CertificatePinner.Builder()      .add("api.sirius.example", "sha256/…")      .build()  ).build()

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    ATT&CK techniques

    —

    Noroxi analysis

    No Noroxi analysis for this record yet

    We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

    We use this product, ask for help

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records