Siemens SIMATIC S7-300 CPU/SIMATIC S7-400 CPU Password insufficiently protected credentials

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.6$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Siemens SIMATIC S7-300 CPU and SIMATIC S7-400 CPU. This impacts an unknown function. The manipulation results in insufficiently protected credentials (Password). This vulnerability is reported as CVE-2020-15791. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in Siemens SIMATIC S7-300 CPU and SIMATIC S7-400 CPU (SCADA Software) (unknown version). Affected is an unknown code block. The manipulation with an unknown input leads to a insufficiently protected credentials vulnerability (Password). CWE is classifying the issue as CWE-522. The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. This is going to have an impact on confidentiality. CVE summarizes:

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.

The weakness was disclosed 09/09/2020 (Website). The advisory is available at cert-portal.siemens.com. This vulnerability is traded as CVE-2020-15791 since 07/15/2020. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/03/2026). This vulnerability is assigned to T1552 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

ADP CISA Base Score: 6.5
ADP CISA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Password
Class: Insufficiently protected credentials / Password
CWE: CWE-522
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/15/2020 🔍
09/09/2020 +56 days 🔍
09/10/2020 +1 days 🔍
06/03/2026 +2092 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: cert-portal.siemens.com
Status: Not defined

CVE: CVE-2020-15791 (🔍)
GCVE (CVE): GCVE-0-2020-15791
GCVE (VulDB): GCVE-100-161082

Entryinfo

Created: 09/10/2020 07:41
Updated: 06/03/2026 02:43
Changes: 09/10/2020 07:41 (37), 09/10/2020 07:46 (18), 06/03/2026 02:43 (29)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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