Vulnerability Monitor

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CVE-2021-25661

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). SmartVNC has an out-of-bounds memory access vulnerability that could be triggered on the client side when sending data from the server, which could result in a Denial-of-Service condition.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 19 products from siemens, from siemens, from siemens and 16 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-05-12T14:15:11.300

Last Modified

2024-11-21T05:55:14.483

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-788

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	siemens	simatic_wincc_runtime_advanced	< 16	Yes
Application	siemens	simatic_wincc_runtime_advanced	16	Yes
Application	siemens	simatic_wincc_runtime_advanced	16	Yes
Application	siemens	simatic_wincc_runtime_advanced	16	Yes
Application	siemens	simatic_wincc_runtime_advanced	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	16	Yes
Hardware	siemens	simatic_hmi_comfort_outdoor_panels_7\"	-	No
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	16	Yes
Hardware	siemens	simatic_hmi_comfort_outdoor_panels_15\"	-	No
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	16	Yes
Hardware	siemens	simatic_hmi_comfort_panels_4\"	-	No
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	16	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	16	Yes
Hardware	siemens	simatic_hmi_comfort_panels_22\"	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	16	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp400f	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	16	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp700	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	16	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp700f	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	16	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp900	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	< 16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	16	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	16	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp900f	-	No
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_7\"_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_comfort_outdoor_panels_7\"	-	No
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_outdoor_panels_15\"_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_comfort_outdoor_panels_15\"	-	No
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_4\"_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_comfort_panels_4\"	-	No
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_comfort_panels_22\"_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_comfort_panels_22\"	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp400f_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp400f	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp700	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp700f_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp700f	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp900	-	No
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	< 15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	15.1	Yes
Operating System	siemens	simatic_hmi_ktp_mobile_panels_ktp900f_firmware	15.1	Yes
Hardware	siemens	simatic_hmi_ktp_mobile_panels_ktp900f	-	No
Application	siemens	simatic_wincc_runtime_advanced	< 15.1	Yes
Application	siemens	simatic_wincc_runtime_advanced	15.1	Yes
Application	siemens	simatic_wincc_runtime_advanced	15.1	Yes
Application	siemens	simatic_wincc_runtime_advanced	15.1	Yes
Application	siemens	simatic_wincc_runtime_advanced	15.1	Yes
Application	siemens	simatic_wincc_runtime_advanced	15.1	Yes
Application	siemens	simatic_wincc_runtime_advanced	15.1	Yes

References

https://cert-portal.siemens.com/productcert/pdf/ssa-538778.pdf Vendor Advisory ([email protected])
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-12 Third Party Advisory, US Government Resource ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-538778.pdf Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://us-cert.cisa.gov/ics/advisories/icsa-21-131-12 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For siemens's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.