CVE-2017-18820

Script execution via undisclosed stored input

Published Apr 21, 2020 · Updated Aug 5, 2024

Stored cross-site scripting in NETGEAR ReadyNAS OS 6 before 6.8.0 allows attackers to run script in an administrator's browser. NETGEAR has not disclosed the affected administrative interface field or the operation that stores and later renders untrusted input. Exploitation requires high privileges and a user to view the stored content; published impact is limited to low confidentiality, integrity, and availability effects.

CVSS severity4.8
Medium
EPSS probability0.48%
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 ReadyNAS OS 6 before 6.8.0 allows attackers to run script in an administrator's browser. NETGEAR has not disclosed the affected administrative interface field or the operation that stores and later renders untrusted input. Exploitation requires high privileges and a user to view the stored content; published impact is limited to low confidentiality, integrity, and availability effects.

The record

CVE
CVE-2017-18820
Published
Apr 21, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 21, 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

5.2NETGEARCVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV: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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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