CVE intelligence and bounded remediation
CVE-2017-18866 — Certain NETGEAR devices are affected by stored XSS
Medium
CVSS 6.1
Certain NETGEAR devices are affected by stored XSS. This affects R9000 before 1.0.2.40, R6100 before 1.0.1.1, 6R7500 before 1.0.0.110, R7500v2 before 1.0.3.20, R7800 before 1.0.2.36, WNDR4300v2 before 1.0.0.48, and WNR2000v5 before 1.0.0.58.
- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Published
- 2020-05-05
- CISA KEV
- Not currently listed
- Ecosystem
- operating-system
- Weaknesses
- CWE-79
Affected products
- netgear / 6r7500_firmware
- netgear / r6100_firmware
- netgear / r7500_firmware
- netgear / r7800_firmware
- netgear / r9000_firmware
- netgear / wndr4300_firmware
Showing 6 representative product identities from 7 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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