CVE-2026-9588Network attack vector

Authenticated script execution via unsanitized template content

Published Jul 17, 2026 · Updated Jul 17, 2026

Stored XSS in Sangoma Switchvox SMB 8.3 (104997) allows remote authenticated users to execute scripts through voicemail templates. The submit_modify_voicemail_template endpoint stores unsanitized HTML from the template_text parameter and later renders it to other users. Exploitation requires authenticated template-editing access and passive interaction by a user who views the saved template, enabling browser-context data access or actions.

CVSS severity7.0
High
EPSS probability0.40%
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 Sangoma Switchvox SMB 8.3 (104997) allows remote authenticated users to execute scripts through voicemail templates. The submit_modify_voicemail_template endpoint stores unsanitized HTML from the template_text parameter and later renders it to other users. Exploitation requires authenticated template-editing access and passive interaction by a user who views the saved template, enabling browser-context data access or actions.

The record

CVE
CVE-2026-9588
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
Asterisk
Product
Switchvox SMB
Classifications
CWE-79, CAPEC-63, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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=8.3 (104997) <8.4.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Asterisk · Switchvox SMBversion=8.3 (104997) <8.4.0.2

Published CVSS scores

7.0Security Risk AdvisorsCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:H/VA:N/SC:L/SI:L/SA:L

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
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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