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PatchSiren cyber security CVE debrief

CVE-2025-29628 Gardyn CVE debrief

CVE-2025-29628 describes an insecure transport issue in Gardyn’s update flow: an Azure IoT Hub connection string is downloaded over HTTP rather than a protected channel. According to the CISA advisory, that leaves the string vulnerable to interception and modification in a man-in-the-middle attack, which could expose device credentials or enable control of affected home kits.

Vendor
Gardyn
Product
<master.619
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-24
Original CVE updated
2026-07-02
Advisory published
2026-02-24
Advisory updated
2026-07-02

Who should care

Gardyn customers and operators using affected Gardyn Home/Studio firmware, the Gardyn mobile application, and connected cloud/API services should care most—especially anyone relying on the app to manage devices or receive updates.

Technical summary

The supplied CISA CSAF advisory (ICSA-26-055-03) describes a network-exposed weakness where a Gardyn Azure IoT Hub connection string is fetched over insecure HTTP. That creates a clear interception and tampering opportunity for an on-path attacker. The advisory links the issue to high confidentiality and integrity impact, with possible device takeover if an attacker captures or alters the connection string.

Defensive priority

High. The issue is remotely reachable, involves credential/connection-string exposure, and can affect device control. Prioritize patching and transport hardening.

Recommended defensive actions

  • Upgrade Gardyn Home and Studio devices to firmware master.622 or later, as recommended in the advisory.
  • Update the Gardyn mobile application to the latest supported version.
  • Verify the app-reported current app and home firmware versions to confirm remediation.
  • Ensure affected devices have network connectivity so they can automatically receive required firmware updates.
  • If devices are offline or cannot update, bring them onto a working Internet connection and re-check update status.
  • Review the Gardyn security guidance and support channels referenced in the advisory for vendor-confirmed remediation steps.

Evidence notes

Primary evidence comes from the CISA CSAF advisory ICSA-26-055-03 for CVE-2025-29628, published 2026-02-24 and updated 2026-04-02 (Update A). The advisory states that an Azure IoT Hub connection string is downloaded over insecure HTTP, making it vulnerable to interception and modification via man-in-the-middle attack, with possible credential capture and device control. The advisory’s remediation section recommends updating to firmware master.622 or later and using the latest Gardyn mobile application. The supplied metadata also marks the vendor/product mapping as low-confidence and revised in Update A.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-29628 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-29628

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-29628 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-29628

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-055-03.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-055-03

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.