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PatchSiren cyber security CVE debrief

CVE-2026-28742 Naxclow CVE debrief

CVE-2026-28742 is a critical vulnerability in Naxclow devices that enables an attacker to generate valid signatures for arbitrary device or account operations. This is due to the use of a uniform request-signing scheme based on a hard-coded, platform-wide salt embedded in every firmware image, combined with the system's use of plain HTTP for control-plane traffic.

Vendor
Naxclow
Product
Smart Doorbell X3
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-11
Advisory published
2026-06-11
Advisory updated
2026-06-11

Who should care

Administrators and users of Naxclow devices should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability has a CVSS score of 9.2 and is classified as CRITICAL. It allows an attacker to generate valid signatures for arbitrary device or account operations due to the absence of per-device keys, server-side nonce tracking, or replay protections.

Defensive priority

High

Recommended defensive actions

  • Update firmware to a version that uses per-device keys or other secure authentication mechanisms.
  • Use secure communication protocols (e.g., HTTPS) for control-plane traffic.
  • Implement server-side nonce tracking or replay protections.

Evidence notes

The vulnerability is described in the CVE record [cve-org] and detailed in the NVD [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-28742 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-28742

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

  • CVE-2026-28742 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-28742

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

Supplemental references

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.