CVE-2025-34333Public exploit

SYSTEM code execution via modifiable web document root

Published Nov 19, 2025 · Updated Nov 20, 2025

Incorrect default permissions in AudioCodes Fax Server and Auto Attendant IVR 2.6.23 and earlier allow local users to gain SYSTEM privileges. The C:\F2MAdmin\F2E document root grants Authenticated Users modify rights while its Apache process executes server-side scripts as NT AUTHORITY\SYSTEM. A local account is sufficient to plant and request a script, granting complete control of the host.

CVSS severity8.5
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in AudioCodes Fax Server and Auto Attendant IVR 2.6.23 and earlier allow local users to gain SYSTEM privileges. The C:\F2MAdmin\F2E document root grants Authenticated Users modify rights while its Apache process executes server-side scripts as NT AUTHORITY\SYSTEM. A local account is sufficient to plant and request a script, granting complete control of the host.

The record

CVE
CVE-2025-34333
Published
Nov 19, 2025
Updated
Nov 20, 2025
Vendor
AudioCodes Ltd.
Product
Fax Server and Auto Attendant IVR
Classifications
CWE-276, T1505.003
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 2025CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=0 <=2.6.23

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

AudioCodes Ltd. · Fax Server and Auto Attendant IVRversion=0 <=2.6.23

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1505.003Web Shell

Public exploit references

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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