CVE-2020-15786

CRITICAL
9.8
CVSS Score
Published: September 9, 2020 at 06:11 PM UTC
Updated: June 17, 2026 at 02:57 AM UTC
8 products affected across 1 vendorSIMATIC HMI Comfort Panels FirmwareSIMATIC HMI United Comfort Panels FirmwareSIMATIC HMI Basic Panels 2ND Generation Firmware

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 14
siemens-simatic-hmi-basic-panels-2nd-generation (same device)
All versions
siemens-simatic-hmi-comfort-panels (same device)
All versions
siemens-simatic-hmi-mobile-panels (same device)
All versions
siemens-simatic-hmi-united-comfort-panels (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-307

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