CVE-2017-18866

Browser script execution via stored content

Published May 5, 2020 · Updated Aug 5, 2024

Stored XSS in seven NETGEAR router models before their listed fixed firmware allows attackers to execute script in a user's browser. NETGEAR has not published the affected management-interface field or the storage and rendering path that fails to neutralize attacker-controlled content. Exploitation requires network reachability and user interaction; affected firmware is 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.

CVSS severity6.1
Medium
EPSS probability0.65%
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 seven NETGEAR router models before their listed fixed firmware allows attackers to execute script in a user's browser. NETGEAR has not published the affected management-interface field or the storage and rendering path that fails to neutralize attacker-controlled content. Exploitation requires network reachability and user interaction; affected firmware is 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.

The record

CVE
CVE-2017-18866
Published
May 5, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
5.2MITRECVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:C/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
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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