CVE-2019-20677

Privileged stored script execution through undisclosed input

Published Apr 15, 2020 · Updated Aug 5, 2024

Stored XSS in NETGEAR RBR50, RBS50, and RBK50 firmware before 2.3.5.30 allows local users to execute script in a privileged web context. NETGEAR has not published the affected input, endpoint, or unsafe storage and rendering operation. Exploitation requires high privileges and local access; the published assessment limits impact to confidentiality and integrity without service interruption.

CVSS severity6.0
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 XSS in NETGEAR RBR50, RBS50, and RBK50 firmware before 2.3.5.30 allows local users to execute script in a privileged web context. NETGEAR has not published the affected input, endpoint, or unsafe storage and rendering operation. Exploitation requires high privileges and local access; the published assessment limits impact to confidentiality and integrity without service interruption.

The record

CVE
CVE-2019-20677
Published
Apr 15, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
local
Privileges
admin

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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
6.0NETGEARCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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