CVE-2019-20671Network attack vector

Stored XSS via unsanitized web input

Published Apr 15, 2020 · Updated Aug 5, 2024

Stored cross-site scripting in NETGEAR Orbi firmware before the listed fixes allows remote authenticated users to execute script in router web interfaces. The vendor and CNA identify a stored XSS condition but do not publish the affected web component or the exact input-handling operation. Exploitation requires access to the device management interface and a victim viewing the stored content, enabling script execution in that browser session without a demonstrated service outage.

CVSS severity4.8
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in NETGEAR Orbi firmware before the listed fixes allows remote authenticated users to execute script in router web interfaces. The vendor and CNA identify a stored XSS condition but do not publish the affected web component or the exact input-handling operation. Exploitation requires access to the device management interface and a victim viewing the stored content, enabling script execution in that browser session without a demonstrated service outage.

The record

CVE
CVE-2019-20671
Published
Apr 15, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
6.0MITRE CNACVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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