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CVE-2021-27384

A vulnerability has been identified in SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (...

Published: May 12, 2021Updated: Jun 2, 2026 Sources: CVE List NVD BDU csafCWE-788
9.8CRITICAL
NVD MITRE
EPSS Score
2.5%
Top 17.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

SINAMICS medium voltage products, with Sm@rtServer enabled on SIMATIC comfort HMI Panels, are affected by multiple vulnerabilities that could allow an attacker, under certain conditions, to gain full remote access to the HMI. Note that by default Sm@rtServer is disabled, but it can be enabled by the system integrator on request. Siemens has released updates for the affected products, and recommends to update them to the latest version.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-788

Affected Products

Siemens AG
commercial·DEaka Siemens
SIMATIC HMI Comfort Outdoor Panels V15 7\" & 15\" (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC HMI Comfort Outdoor Panels V16 7\" & 15\" (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants)
ICS / OT / IoT
SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F
ICS / OT / IoT
SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F
ICS / OT / IoT
SIMATIC WinCC Runtime Advanced V15
ICS / OT / IoT
SIMATIC WinCC Runtime Advanced V16
ICS / OT / IoT
and 47 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-27384?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://cert-portal.siemens.com/productcert/csaf/ssa-286838.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/txt/ssa-286838.txt
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf
cert-portal.siemens.com
and 27 more references View all →
News mentions
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