Is CVE-2020-15798 in the CISA KEV catalog?

No. CVE-2020-15798 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-15798?

CVE-2020-15798 has a CVSS v3 base score of 9.8 (CRITICAL).

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

CVE-2020-15798 has an EPSS score of 5.18% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-15798?

Upgrade simatic hmi comfort panels firmware to 16.0 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-15798

CRITICALEPSS 91th pctl

9.8

CVSS v3

NVD

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)

CWE-306Missing Authentication for Critical Function

How to fix

Remediation Available

simatic hmi comfort panels firmwareNVD

Affected:< 16.0Fixed in:16.0CVE-2020-15798derived from NVD

simatic hmi ktp mobile panels firmwareNVD

Affected:< 16.0Fixed in:16.0CVE-2020-15798derived 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

5.18%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch1

cert-portal.siemens.com

Vendor Advisory1

cert-portal.siemens.com

Third-Party Advisory1

us-cert.cisa.gov

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-37415	Critical	9.8	100%	KEV	-
CVE-2023-21839	High	7.5	100%	KEV	-

Embed a live status badge for CVE-2020-15798

Markdown

[![CVE-2020-15798](https://tridentstack.com/cve/badge/CVE-2020-15798.svg)](https://tridentstack.com/cve/CVE-2020-15798)

HTML

<a href="https://tridentstack.com/cve/CVE-2020-15798"><img src="https://tridentstack.com/cve/badge/CVE-2020-15798.svg" alt="CVE-2020-15798"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.