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PatchSiren cyber security CVE debrief

CVE-2025-1242 Gardyn CVE debrief

CVE-2025-1242 is a critical Gardyn issue in which administrative credentials may be extracted from application API responses, through mobile app reverse engineering, and through device firmware reverse engineering. CISA says this could let an attacker obtain full administrative access to the Gardyn IoT Hub and maliciously control connected devices. The advisory was initially published on 2026-02-24 and updated on 2026-04-02 to reflect additional vulnerabilities and revised mitigations.

Vendor
Gardyn
Product
<master.619
CVSS
CRITICAL 9.1
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 Home and Studio users, especially anyone running affected firmware or the mobile app, should treat this as high priority. Security teams responsible for smart-home or IoT environments should also care because compromise of the hub can affect connected devices and home network trust boundaries.

Technical summary

The advisory describes exposed administrative credentials associated with Gardyn services and devices. The stated exposure paths are application API responses, mobile application reverse engineering, and device firmware reverse engineering. CISA’s impact statement is that an attacker could gain full administrative access to the Gardyn IoT Hub, which could expose connected devices to malicious control. The CVSS vector provided is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N, consistent with a network-reachable, low-complexity exposure with high confidentiality and integrity impact.

Defensive priority

Urgent. Because the issue can lead to administrative access and device control, remediation should be prioritized as soon as supported updates are available.

Recommended defensive actions

  • Update the Gardyn mobile application to the most recent supported version.
  • Upgrade Gardyn Home and Studio firmware to master.622 or later, as recommended in the advisory.
  • Confirm the current app and home kit firmware versions in the Gardyn app.
  • Ensure the devices have network connectivity so firmware updates can download automatically.
  • Review Gardyn’s security information and support guidance at the vendor security page.
  • If you manage an affected environment, monitor for unexpected device behavior or unauthorized administrative activity while updates are being applied.

Evidence notes

This debrief is based on CISA’s CSAF advisory ICSA-26-055-03 for CVE-2025-1242, published 2026-02-24 and revised 2026-04-02. The advisory text states that administrative credentials can be extracted via API responses, mobile app reverse engineering, and device firmware reverse engineering, and that the resulting exposure may allow full administrative access to the Gardyn IoT Hub. Mitigation guidance in the advisory recommends updating the mobile app and upgrading firmware to master.622 or later. Vendor metadata in the supplied record is low confidence and should be treated cautiously.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-1242 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-1242

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

  • CVE-2025-1242 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-1242

    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.