CVE intelligence and bounded remediation

CVE-2020-7508 — Schneider-Electric Easergy T300 Firmware security vulnerability

Critical CVSS 9.8

A CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists in Easergy T300 (Firmware version 1.5.2 and older) which could allow an attacker to gain full access by brute force.

Severity
Critical
CVSS
9.8 (3.1)
Published
2020-06-16
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-307

Affected products

  • schneider-electric / easergy_t300_firmware

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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