CVE-2020-15791
Summary
| CVE | CVE-2020-15791 |
|---|---|
| State | PUBLISHED |
| Assigner | siemens |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-09-09 19:15:20 UTC |
| Updated | 2026-06-02 20:16:24 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 6.5 MEDIUM from [email protected]
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.000810000 probability, percentile 0.239660000 (date 2026-06-02)
Problem Types: CWE-522 | CWE-522 CWE-522: Insufficiently Protected Credentials
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | ADP | DECLARED | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 6.5 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 2.0 | [email protected] | Primary | 3.3 | AV:A/AC:L/Au:N/C:P/I:N/A:N |
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
NoneAvailability
NoneCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0 Breakdown
Access Vector
AdjacentAccess Complexity
LowAuthentication
NoneConfidentiality
PartialIntegrity
NoneAvailability
NoneAV:A/AC:L/Au:N/C:P/I:N/A:N
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Siemens | SIMATIC S7-300 CPU Family Incl. Related ET200 CPUs And SIPLUS Variants | affected All versions | Not specified |
| CNA | Siemens | SIMATIC S7-400 CPU Family Incl. SIPLUS Variants | affected All versions | Not specified |
| CNA | Siemens | SIMATIC WinAC RTX F 2010 | affected All versions | Not specified |
| CNA | Siemens | SINUMERIK 840D Sl | affected All versions | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf | af854a3a-2127-422b-91ae-364da2661108 | cert-portal.siemens.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.