CVE-2026-66146Network attack vector

Browser script execution via undisclosed XSS vectors

Published Aug 11, 2026 · Updated Aug 11, 2026

Cross-site scripting in SonicWall GMS 9.5.1 and earlier allows remote attackers to execute JavaScript in a user's browser. SonicWall has not disclosed the affected pages or parameters, the input-handling error, or whether the scripts are stored, reflected, or DOM-based. Exploitation requires user interaction with crafted content; successful script execution can read or alter data available to the affected browser session.

CVSS severity6.1
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in SonicWall GMS 9.5.1 and earlier allows remote attackers to execute JavaScript in a user's browser. SonicWall has not disclosed the affected pages or parameters, the input-handling error, or whether the scripts are stored, reflected, or DOM-based. Exploitation requires user interaction with crafted content; successful script execution can read or alter data available to the affected browser session.

The record

CVE
CVE-2026-66146
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
SonicWall
Product
Global Management System (GMS)
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.5.1 and earlier versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SonicWall · Global Management System (GMS)version=9.5.1 and earlier versions

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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