CVE-2017-18809

Stored browser script execution via undisclosed input handling

Published Apr 21, 2020 · Updated Aug 5, 2024

Stored XSS in NETGEAR ReadyNAS OS before 6.8.0 allows attackers to execute scripts in an administrator's browser via crafted input. NETGEAR has not published the affected interface, input field, storage locus, or output-encoding failure that causes the payload to persist and render. Exploitation requires high privileges and user interaction; successful execution can read or alter browser-accessible data in the victim's ReadyNAS session.

CVSS severity5.2
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in NETGEAR ReadyNAS OS before 6.8.0 allows attackers to execute scripts in an administrator's browser via crafted input. NETGEAR has not published the affected interface, input field, storage locus, or output-encoding failure that causes the payload to persist and render. Exploitation requires high privileges and user interaction; successful execution can read or alter browser-accessible data in the victim's ReadyNAS session.

The record

CVE
CVE-2017-18809
Published
Apr 21, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
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

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 vectorlocal
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
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

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')
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo