CVE intelligence and bounded remediation

CVE-2026-35503 — Senselive X3500 Firmware security vulnerability

Critical CVSS 9.8

A vulnerability in SenseLive X3050’s web management interface allows authentication logic to be performed entirely on the client side, relying on hardcoded values within browser-executed scripts rather than server-side verification. An attacker with access to the login page could retrieve these exposed parameters and gain unauthorized access to administrative functionality.

Severity
Critical
CVSS
9.8 (3.1)
Published
2026-04-24
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-798

Affected products

  • senselive / x3500_firmware / 1.523

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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