CVE-2021-45664

Browser script execution via stored cross-site scripting

Published Dec 26, 2021 · Updated Aug 4, 2024

Stored cross-site scripting in NETGEAR R7000 firmware before 1.0.11.126 allows physically proximate attackers to execute browser script. NETGEAR's advisory does not identify the management-interface field, storage path, or output context that fails to neutralize persisted input. Exploitation requires high privileges, physical access, and user interaction; successful script execution can expose browser data and modify displayed content.

CVSS severity5.6
Medium
EPSS probability0.56%
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 R7000 firmware before 1.0.11.126 allows physically proximate attackers to execute browser script. NETGEAR's advisory does not identify the management-interface field, storage path, or output context that fails to neutralize persisted input. Exploitation requires high privileges, physical access, and user interaction; successful script execution can expose browser data and modify displayed content.

The record

CVE
CVE-2021-45664
Published
Dec 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059.007
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectorphysical
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.6NETGEARCVSS:3.0/AV:P/AC:L/PR:H/UI:R/S:C/C:H/I:L/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)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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