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TI-2020-12422 Aliases CVE-2020-15787GHSA-625f-424x-6j4w

Authentication bypass in Siemens SIMATIC HMI Unified Comfort Panels

Priority MEDIUM 45CWE-305Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

A vulnerability has been identified in SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently validate authentication attempts as the information given can be truncated to match only a set number of characters versus the whole provided string. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.

Why it matters now

EPSS 0.01477 74th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensSIMATIC HMI Unified Comfort Panelsup to V16—No fix listedCNA
  • SIMATIC HMI Unified Comfort Panels VendorSiemens Affected up to V16 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:siemens:simatic_hmi_united_comfort_panels_firmware:*:*:*:*:*:*:*:*all versionsVulnerableSiemens
cpe:2.3:h:siemens:simatic_hmi_united_comfort_panels:-:*:*:*:*:*:*:*not specified by NVDRunning onSiemens
  • cpe:2.3:o:siemens:simatic_hmi_united_comfort_panels_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
  • cpe:2.3:h:siemens:simatic_hmi_united_comfort_panels:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-15787
  2. 2026-10-03 Alias added: GHSA-625f-424x-6j4w

References

Advisory 1

  • TI-2020-12421 Missing brute-force protection in Siemens SIMATIC HMI Basic Panels 2nd Generation CVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences