CVE-2025-9495

highpriority · track · 0EPSS 0.002 · 15 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.24% (15th) EPSS

CVSS 8.8 · high

Is it mine?

3 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cisa_csaf_ot

EPSS · scored 2026-10-27

The Vitogate 300 web interface fails to enforce proper server-side authentication and relies on frontend-based authentication controls. This allows an attacker to simply modify HTML elements in the browser’s developer tools to bypass login restrictions. By removing specific UI elements, an attacker can reveal the hidden administration menu, giving them full control over the device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedVitogate 300cisa_csaf_ot
These vulnerabilities have been resolved in Vitogate 300 software version 3.1.0.1. Users are strongly encouraged to upgrade by downloading software version 3.1.0.1 or newer from the Vitogate 300 website.
https://connectivity.viessmann-climatesolutions.com/gb/mp-fp/vitogate/vitogate-300-bn-mb.html
MitigationVitogate 300cisa_csaf_ot
For more information refer to Carrier's product security advisory CARR-PSA-2025-02.
https://www.corporate.carrier.com/product-security/advisories-resources/

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.3–8.8

v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US

v4.08.7highCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.08.7highCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · productsecurity@carrier.com

v4.06.3mediumCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-602USCWE-602US

affected products (3)

Products and version ranges known to be affected.

Viessmann Vitogate 300: <3.1.0.1all versionscisa_csaf_otUS
Viessmann Vitogate 300< 3.1.0.1cisa_csaf_otUS
Viessmann Vitogate 3001 → 3.0.0.0enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-25-266-04Viessmann Vitogate 3002025-09-23icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could allow an attacker to modify an intended OS command when it is sent to a downstream component, or allow an attacker to cause unexpected interactions between the client and server.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot NVD CVE.org MITRE

published 2025-09-23modified 2026-06-17

references (3)

External citations — patches, advisories, analysis.

scry

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