Siemens SIMATIC HMI Comfort Outdoor Panels up to 16 Update 3 Device Layout memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Siemens SIMATIC HMI Comfort Outdoor Panels, SIMATIC HMI Comfort Panels, SIMATIC HMI KTP Mobile Panels and SIMATIC Wincc Runtime Advanced up to 16 Update 3. The affected element is an unknown function of the component Device Layout Handler. The manipulation leads to memory corruption. This vulnerability is listed as CVE-2021-27386. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Siemens SIMATIC HMI Comfort Outdoor Panels, SIMATIC HMI Comfort Panels, SIMATIC HMI KTP Mobile Panels and SIMATIC Wincc Runtime Advanced up to 16 Update 3 (SCADA Software) and classified as problematic. This issue affects an unknown code of the component Device Layout Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. The summary by CVE is:

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 a heap allocation leak vulnerability in the device layout handler on client side, which could result in a Denial-of-Service condition.

The weakness was presented 05/12/2021 as ssa-286838. It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2021-27386. The technical details are unknown and an exploit is not publicly available.

Applying the patch 16 Update 4 is able to eliminate this problem.

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Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 16 Update 4

Timelineinfo

02/18/2021 🔍
05/12/2021 +82 days 🔍
05/12/2021 +0 days 🔍
06/03/2026 +1848 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-286838
Status: Confirmed

CVE: CVE-2021-27386 (🔍)
GCVE (CVE): GCVE-0-2021-27386
GCVE (VulDB): GCVE-100-174983

Entryinfo

Created: 05/12/2021 22:37
Updated: 06/03/2026 04:09
Changes: 05/12/2021 22:37 (40), 05/15/2021 16:23 (5), 06/03/2026 04:09 (43)
Complete: 🔍
Cache ID: 216::103

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