CVE intelligence and bounded remediation

CVE-2020-35828 — Certain NETGEAR devices are affected by stored XSS

Medium CVSS 6.1

Certain NETGEAR devices are affected by stored XSS. This affects D7800 before 1.0.1.56, RBK20 before 2.3.5.26, RBR20 before 2.3.5.26, RBS20 before 2.3.5.26, RBK40 before 2.3.5.30, RBR40 before 2.3.5.30, RBS40 before 2.3.5.30, RBK50 before 2.3.5.30, RBR50 before 2.3.5.30, RBS50 before 2.3.5.30, R7800 before 1.0.2.74, R8900 before 1.0.4.28, R9000 before 1.0.4.28, XR500 before 2.3.2.56, XR700 before 1.0.1.10, RAX120 before 1.0.0.78, and R7500v2 before 1.0.3.46.

Severity
Medium
CVSS
6.1 (3.1)
Published
2020-12-30
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-79

Affected products

  • netgear / d7800_firmware
  • netgear / r7500v2_firmware
  • netgear / r7800_firmware
  • netgear / r8900_firmware
  • netgear / r9000_firmware
  • netgear / rax120_firmware

Showing 6 representative product identities from 17 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cross-site scripting and unsafe browser output

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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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