# Affected devices do not properly restrict access to the web browser via the Control Panel when no corresponding security mechanisms are in place.

CVE record · `CVE-2026-27662`

- **Identifiers:** `CVE-2026-27662`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **CNA:** siemens
- **Weakness (CWE):** [CWE-1188](https://cwe.mitre.org/data/definitions/1188.html)
- **Tags:** [CWE-1188](https://agentprime.io/advisories/tag/cwe-1188.md)
- **Technologies:** [Siemens SIMATIC HMI MTP1000 Unified Comfort Panel](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1000-unified-comfort-panel.md) · [Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1000-unified-comfort-panel-hygienic.md) · [Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1000-unified-comfort-panel-hygienic-neutral-design.md) · [Siemens SIMATIC HMI MTP1000, Unified Comfort Panel neutral](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1000-unified-comfort-panel-neutral.md) · [Siemens SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-comfort-pro-for-stand-expandable-flange-at-the-botto.md) · [Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-comfort-pro-for-support-arm-expandable-round-tube-an.md) · [Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-comfort-pro-for-support-arm-not-extendable-flange-on.md) · [Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-comfort-pro-neutral-design-for-stand-expandable-flan.md) · [Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-comfort-pro-neutral-design-for-support-arm-expandabl.md) · [Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-comfort-pro-neutral-design-for-support-arm-not-exten.md) · [Siemens SIMATIC HMI MTP1200 Unified Comfort Panel](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-unified-comfort-panel.md) · [Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-unified-comfort-panel-hygienic.md) · [Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-unified-comfort-panel-hygienic-neutral-design.md) · [Siemens SIMATIC HMI MTP1200 Unified Comfort Panel neutral design](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1200-unified-comfort-panel-neutral-design.md) · [Siemens SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1500-comfort-pro-for-stand-expandable-flange-at-the-botto.md) · [Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1500-comfort-pro-for-support-arm-expandable-round-tube-an.md) · [Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1500-comfort-pro-for-support-arm-not-extendable-flange-on.md) · [Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1500-comfort-pro-neutral-design-for-stand-expandable-flan.md) · [Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1500-comfort-pro-neutral-design-for-support-arm-expandabl.md) · [Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top)](https://agentprime.io/advisories/technology/siemens-simatic-hmi-mtp1500-comfort-pro-neutral-design-for-support-arm-not-exten.md)
- **Published:** 12 May 2026
- **Updated:** 13 May 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: siemens) at 12 May 2026, 08:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Siemens. Product: SIMATIC HMI MTP1000 Unified Comfort Panel.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1000 Unified Comfort Panel hygienic.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1000, Unified Comfort Panel neutral.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Unified Comfort Panel.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Unified Comfort Panel hygienic.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1200 Unified Comfort Panel neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Unified Comfort Panel.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Unified Comfort Panel hygienic.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1500 Unified Comfort Panel neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Unified Comfort Panel.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Unified Comfort Panel hygienic.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Unified Comfort Panel hygienic neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP1900 Unified Comfort Panel neutral design.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP2200 Comfort Pro for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP2200 Comfort Pro for support arm (expandable, round tube) and extension unit.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP2200 Comfort Pro for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP2200 Comfort Pro neutral design for stand (expandable, flange at the bottom).
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio.
  - affected: `before V21` (custom)
  - Other versions: unknown
- Vendor: Siemens. Product: SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (not extendable, flange on top).
  - affected: `before V21` (custom)
  - Other versions: unknown

And 11 more products. The full list is on the CVE record: <https://www.cve.org/CVERecord?id=CVE-2026-27662>

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.7 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`, from CNA (siemens)
- 7.0 High, CVSS 4.0: `CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (siemens) (used for this record)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0011, the 1st percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 12 May 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-27662](https://www.cve.org/CVERecord?id=CVE-2026-27662)
- [NVD: CVE-2026-27662](https://nvd.nist.gov/vuln/detail/CVE-2026-27662)

### References from the CNA

- <https://cert-portal.siemens.com/productcert/html/ssa-387223.html>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-27662>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-27662/>. Everything for agents: <https://agentprime.io/llms.txt>.