CVE-2026-73663Network attack vectorHinoki check available

Administrator takeover via Caller ID SQL injection

Published Aug 13, 2026 · Updated Aug 13, 2026

SQL injection in FreePBX Missed Call Notification before 16.0.11 and 17.0.1 through 17.0.5 allows remote attackers to alter PBX data. The missedcallnotify.php logger interpolates the SIP From header's Caller ID name into a missedcalllog INSERT without escaping or parameters. Exploitation requires an unanswered call to a monitored extension; altering administrator records grants unauthorized remote access.

CVSS severity9.3
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

SQL injection in FreePBX Missed Call Notification before 16.0.11 and 17.0.1 through 17.0.5 allows remote attackers to alter PBX data. The missedcallnotify.php logger interpolates the SIP From header's Caller ID name into a missedcalllog INSERT without escaping or parameters. Exploitation requires an unanswered call to a monitored extension; altering administrator records grants unauthorized remote access.

The record

CVE
CVE-2026-73663
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
FreePBX
Product
Missed Call Notification
Classifications
CWE-89, T1190, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 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=< 16.0.11
  2. Affected versionversion=>= 17.0.1, < 17.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreePBX · Missed Call Notificationversion=< 16.0.11; version=>= 17.0.1, < 17.0.4

Published CVSS scores

9.3FreePBXCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1FreePBXCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

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-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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