CVE intelligence and bounded remediation

CVE-2019-20756 — Certain NETGEAR devices are affected by reflected XSS

High CVSS 7.1

Certain NETGEAR devices are affected by reflected XSS. This affects EX7000 before 1.0.0.64, EX6200 before 1.0.3.86, EX6150 before 1.0.0.38, EX6130 before 1.0.0.22, EX6120 before 1.0.0.40, EX6100 before 1.0.2.22, EX6000 before 1.0.0.30, EX3700 before 1.0.0.70, EX3800 before 1.0.0.70, R8300 before 1.0.2.94, R7300DST before 1.0.0.62, R7000P before 1.3.0.20, R6900P before 1.3.0.20, R6400 before 1.0.1.32, R6300v2 before 1.0.4.24, R8500 before 1.0.2.94, WNDR3400v3 before 1.0.1.18, and WN2500RPv2 before 1.0.1.52.

Severity
High
CVSS
7.1 (3.0)
Published
2020-04-16
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-79

Affected products

  • netgear / ex7000_firmware
  • netgear / ex6200_firmware
  • netgear / ex6150_firmware
  • netgear / ex6130_firmware
  • netgear / ex6120_firmware
  • netgear / ex6100_firmware

Showing 6 representative product identities from 18 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cross-site scripting and unsafe browser output

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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