SYSTEM privilege escalation via writable service scripts
Published Nov 19, 2025 · Updated Nov 20, 2025
Local privilege escalation in AudioCodes Fax Server and Auto Attendant IVR 2.6.23 and earlier allows local users to execute commands as SYSTEM. The ajaxPost.php service controls invoke start.bat, stop.bat, and restart.bat with PHP system(), while Authenticated Users receive modify access to those scripts. A local authenticated account can replace a helper script; the next administrator-initiated service action runs its commands with full host control.
Summary
What happened
Local privilege escalation in AudioCodes Fax Server and Auto Attendant IVR 2.6.23 and earlier allows local users to execute commands as SYSTEM. The ajaxPost.php service controls invoke start.bat, stop.bat, and restart.bat with PHP system(), while Authenticated Users receive modify access to those scripts. A local authenticated account can replace a helper script; the next administrator-initiated service action runs its commands with full host control.
The record
- CVE
- CVE-2025-34332
- Published
- Nov 19, 2025
- Updated
- Nov 20, 2025
- Vendor
- AudioCodes Ltd.
- Product
- Fax Server and Auto Attendant IVR
- Classifications
- CWE-276, T1574.010
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 19, 2025CVE publishedPublication date reported by the CVE source.
- Nov 20, 2025Record 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.
- Affected versionversion=0 <=2.6.23
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- Writable service-script privilege-escalation demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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