CVE-2020-15786
mediumpriority · track · 40EPSS 0.015 · 74 %ileDEEUUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedSIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)siemens_psirt
Update to V16 Update 3
https://support.industry.siemens.com/cs/ww/en/view/109775861 - FixedSIMATIC HMI Comfort Panels (incl. SIPLUS variants)siemens_psirt
Update to V16 Update 3
https://support.industry.siemens.com/cs/ww/en/view/109775861 - FixedSIMATIC HMI Mobile Panelssiemens_psirt
Update to V16 Update 3
https://support.industry.siemens.com/cs/ww/en/view/109775861 - FixedSIMATIC HMI Unified Comfort Panelssiemens_psirt
Update to V16 Update 5
https://support.industry.siemens.com/cs/ww/en/view/109746530 - FixedSIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)cisa_csaf_ot
Update to V16 Update 3
https://support.industry.siemens.com/cs/ww/en/view/109775861 - FixedSIMATIC HMI Comfort Panels (incl. SIPLUS variants)cisa_csaf_ot
Update to V16 Update 3
https://support.industry.siemens.com/cs/ww/en/view/109775861 - FixedSIMATIC HMI Mobile Panelscisa_csaf_ot
Update to V16 Update 3
https://support.industry.siemens.com/cs/ww/en/view/109775861 - FixedSIMATIC HMI Unified Comfort Panelscisa_csaf_ot
Update to V16 Update 5
https://support.industry.siemens.com/cs/ww/en/view/109746530 - MitigationSIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)siemens_psirt
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Comfort Panels (incl. SIPLUS variants)siemens_psirt
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Mobile Panelssiemens_psirt
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Unified Comfort Panelssiemens_psirt
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)cisa_csaf_ot
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Comfort Panels (incl. SIPLUS variants)cisa_csaf_ot
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Mobile Panelscisa_csaf_ot
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
- MitigationSIMATIC HMI Unified Comfort Panelscisa_csaf_ot
Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5–9.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (20)
Products and version ranges known to be affected.
- siemens simatic hmi basic panels 2nd generation firmware≤ 14nvdUScpe:2.3:o:siemens:simatic_hmi_basic_panels_2nd_generation_firmware:*:*:*:*:*:*:*:*
- siemens simatic hmi comfort panels firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_hmi_comfort_panels_firmware:*:*:*:*:*:*:*:*
- siemens simatic hmi mobile panels firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_hmi_mobile_panels_firmware:*:*:*:*:*:*:*:*
- siemens simatic hmi united comfort panels firmwareall versionsnvdUScpe:2.3:o:siemens:simatic_hmi_united_comfort_panels_firmware:*:*:*:*:*:*:*:*
advisories (2)
Vendor and ecosystem advisories describing this.
- SSA-542525SSA-542525: Authentication Vulnerabilities in SIMATIC HMI Products2020-09-08csaf · siemens_psirtDE
SIMATIC HMI Products are affected by two vulnerabilities that could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack. Siemens has released updates for the affected products and recommends to update to the latest versions. Siemens also suggests following the listed mitigations for the Unified Comfort Panels.
- ICSA-20-252-06Siemens SIMATIC HMI Products (Update A)2020-09-08icsa · cisa_csaf_otUS
SIMATIC HMI Products are affected by two vulnerabilities that could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack. Siemens has released updates for the affected products and recommends to update to the latest versions. Siemens also suggests following the listed mitigations for the Unified Comfort Panels.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdfcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-15786cnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-20-252-06cnnvd
- https://vigilance.fr/vulnerability/Siemens-SIMATIC-HMI-privilege-escalation-33281cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.3086/cnnvd
- https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdfenisa_euvd
- https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdfVendor Advisorynvd
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