CVE & CISA-KEV Catalog

CVE-2021-27384

CRITICALEPSS 83th pctl
9.8
CVSS v3
NVD

Description

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\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI Comfort Panels V15 4\" - 22\" (incl. SIPLUS variants) (All versions < V15.1 Update 6), SIMATIC HMI Comfort Panels V16 4\" - 22\" (incl. SIPLUS variants) (All versions < V16 Update 4), SIMATIC HMI KTP Mobile Panels V15 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V15.1 Update 6), SIMATIC HMI KTP Mobile Panels V16 KTP400F, KTP700, KTP700F, KTP900 and KTP900F (All versions < V16 Update 4), SIMATIC WinCC Runtime Advanced V15 (All versions < V15.1 Update 6), SIMATIC WinCC Runtime Advanced V16 (All versions < V16 Update 4), SINAMICS GH150 (All versions), SINAMICS GL150 (with option X30) (All versions), SINAMICS GM150 (with option X30) (All versions), SINAMICS SH150 (All versions), SINAMICS SL150 (All versions), SINAMICS SM120 (All versions), SINAMICS SM150 (All versions), SINAMICS SM150i (All versions). SmartVNC has an out-of-bounds memory access vulnerability in the device layout handler, represented by a binary data stream on client side, which can potentially result in code execution.

CWE-788

How to fix

Remediation Available
simatic hmi comfort outdoor panels 15\" firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi comfort outdoor panels 7\" firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi comfort panels 22\" firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi comfort panels 4\" firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi ktp mobile panels ktp400f firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi ktp mobile panels ktp700 firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi ktp mobile panels ktp700f firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi ktp mobile panels ktp900 firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic hmi ktp mobile panels ktp900f firmwareNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD
simatic wincc runtime advancedNVD
Affected:< 15.1Fixed in:15.1CVE-2021-27384derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

2.54%probability of exploitation in 30 days
83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Third-Party Advisory1
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CVE-2021-27384 severity badge

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-02.