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CVE-2020-15791 (GCVE-0-2020-15791)

Vulnerability from cvelistv5 – Published: 2020-09-09 18:13 – Updated: 2026-06-02 18:45
VLAI
Summary
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.
Severity
6.5 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 18:45 UTC
CWE
  • CWE-522 - Insufficiently Protected Credentials
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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Esto podr\u00eda permitir a un atacante que pueda interceptar el tr\u00e1fico de red obtener credenciales del PLC 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Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf\", \"tags\": [\"x_refsource_MISC\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T13:22:30.753Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2020-15791\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-02T18:45:11.766537Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-02T18:45:26.717Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)\", \"versions\": [{\"status\": \"affected\", \"version\": \"All versions\"}]}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-400 CPU family (incl. SIPLUS variants)\", \"versions\": [{\"status\": \"affected\", \"version\": \"All versions\"}]}, {\"vendor\": \"Siemens\", \"product\": \"SIMATIC WinAC RTX (F) 2010\", \"versions\": [{\"status\": \"affected\", \"version\": \"All versions\"}]}, {\"vendor\": \"Siemens\", \"product\": \"SINUMERIK 840D sl\", \"versions\": [{\"status\": \"affected\", \"version\": \"All versions\"}]}], \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-522\", \"description\": \"CWE-522: Insufficiently Protected Credentials\"}]}], \"providerMetadata\": {\"orgId\": \"cec7a2ec-15b4-4faf-bd53-b40f371f3a77\", \"shortName\": \"siemens\", \"dateUpdated\": \"2020-12-14T21:05:18.000Z\"}, \"x_legacyV4Record\": {\"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"All versions\"}]}, \"product_name\": \"SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)\"}, {\"version\": {\"version_data\": [{\"version_value\": \"All versions\"}]}, \"product_name\": \"SIMATIC S7-400 CPU family (incl. SIPLUS variants)\"}, {\"version\": {\"version_data\": [{\"version_value\": \"All versions\"}]}, \"product_name\": \"SIMATIC WinAC RTX (F) 2010\"}, {\"version\": {\"version_data\": [{\"version_value\": \"All versions\"}]}, \"product_name\": \"SINUMERIK 840D sl\"}]}, \"vendor_name\": \"Siemens\"}]}}, \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf\", \"name\": \"https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf\", \"refsource\": \"MISC\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-522: Insufficiently Protected Credentials\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2020-15791\", \"STATE\": \"PUBLIC\", \"ASSIGNER\": \"productcert@siemens.com\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2020-15791\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-02T18:45:29.902Z\", \"dateReserved\": \"2020-07-15T00:00:00.000Z\", \"assignerOrgId\": \"cec7a2ec-15b4-4faf-bd53-b40f371f3a77\", \"datePublished\": \"2020-09-09T18:13:11.000Z\", \"assignerShortName\": \"siemens\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.