Siemens SIMATIC HMI Basic Panel Brute Force excessive authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Siemens SIMATIC HMI Basic Panel, SIMATIC HMI Comfort Panel, SIMATIC HMI Mobile Panel and SIMATIC HMI Mobile Panel. It has been rated as problematic. This issue affects some unknown processing. This manipulation causes excessive authentication (Brute Force). This vulnerability is tracked as CVE-2020-15786. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Siemens SIMATIC HMI Basic Panel, SIMATIC HMI Comfort Panel, SIMATIC HMI Mobile Panel and SIMATIC HMI Mobile Panel (SCADA Software) (version unknown) and classified as problematic. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a excessive authentication vulnerability (Brute Force). The CWE definition for the vulnerability is CWE-307. The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks. As an impact it is known to affect confidentiality. The summary by CVE is:

A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.

The weakness was disclosed 09/09/2020 (Website). The advisory is shared at cert-portal.siemens.com. This vulnerability is known as CVE-2020-15786 since 07/15/2020. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/03/2026). MITRE ATT&CK project uses the attack technique T1110.001 for this issue.

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

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Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

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

NVD Base Score: 9.8
NVD Vector: 🔍

ADP CISA Base Score: 9.8
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: Brute Force
Class: Excessive authentication / Brute Force
CWE: CWE-307 / CWE-799 / CWE-400
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-2020-15786 (🔍)
GCVE (CVE): GCVE-0-2020-15786
GCVE (VulDB): GCVE-100-161077
See also: 🔍

Entryinfo

Created: 09/10/2020 07:36
Updated: 06/03/2026 02:43
Changes: 09/10/2020 07:36 (38), 09/10/2020 07:41 (18), 06/03/2026 02:43 (31)
Complete: 🔍
Cache ID: 216::103

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