No exploitation reportedFix available

CVE-2020-15798

Q: Is CVE-2020-15798 actively exploited?

Active exploitation of CVE-2020-15798 has not been confirmed. Its EPSS score was 5.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-15798?

CVE-2020-15798 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-02-09
Fixed in16.0
WeaknessCWE-306

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions < V16 Update 3a), SIMATIC HMI KTP Mobile Panels (All versions < V16 Update 3a), 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). Affected devices with enabled telnet service do not require authentication for this service. This could allow a remote attacker to gain full access to the device. (ZDI-CAN-12046)

Timeline

dates in UTC

2021-02-0917:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-15798?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-15798?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens simatic hmi comfort panels firmwareversion to verify

Branch	Affected	Fixed in	Source
16.0	< 16.0	16.0	NVD
16.0	= 16.0	no fix published	NVD

Siemens simatic hmi ktp mobile panels firmwareversion to verify

Branch	Affected	Fixed in	Source
16.0	< 16.0	16.0	NVD
16.0	= 16.0	no fix published	NVD

Siemens sinamics gh150 firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

7 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-131-13 CISA8 known affected
Siemens SINAMICS Medium Voltage Products Telnet (Update A)
SINAMICS GH150: All versions · SINAMICS SH150: All versions · SINAMICS GL150 (with option X30): All versions · +5 more
ICSA-21-033-02 CISA2 known affected
Siemens SIMATIC HMI Comfort Panels & SIMATIC HMI KTP Mobile Panels
Siemens SIMATIC HMI Comfort Panels (incl.'SIPLUS variants): All versions < V16 Update 3a · Siemens SIMATIC HMI KTP Mobile Panels: All versions < V16 Update 3a

Full record on NVD

Fix

Update Siemens simatic hmi comfort panels firmware to 16.0
Vendor fix CISA ICSA-21-131-13 · 8 productsOnly HMI image versions prior to v16 Update 3a are affected. Siemens recommends updating the following products to v16 Update 4 or later:
Vendor fix CISA ICSA-21-131-13 · 8 productsAs only SIMATIC HMI image versions prior to v15 SP1 Update 6 are affected, update the HMI panel image as included in your installation of the following products to v15 SP1 Update 6 or later version.
Vendor fix CISA ICSA-21-131-13 · 8 productsSiemens has identified the following specific workarounds and mitigations users can apply to reduce the risk:
Vendor fix CISA ICSA-21-131-13 · 8 productsAs a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens ' operational guidelines for industr…
Vendor fix CISA ICSA-21-131-13 · 8 productsAdditional information on industrial security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Vendor fix CISA ICSA-21-131-13 · 8 productsFor additional information see Siemens Security Advisory SSA-752103

Advisories and patches

cert-portal.siemens.comVendor Advisory
cert-portal.siemens.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-06-02
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.82026-06-02
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
CNAweakness (CWE)CWE-306read 2026-10-23
NVDweakness (CWE)CWE-306read 2026-10-23
FIRST EPSSEPSS score5.2 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-02-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-15798?

Is CVE-2020-15798 actively exploited?

Active exploitation of CVE-2020-15798 has not been confirmed. Its EPSS score was 5.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-15798?

CVE-2020-15798 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Running SIMATIC HMI Comfort Panels (incl? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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