How severe is CVE-2025-34333?

CVE-2025-34333 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-34333 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34333?

CVE-2025-34333 primarily affects Audiocodes Fax Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-34333?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-34333 have an EU (EUVD) identifier?

Yes. CVE-2025-34333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198194.

When was CVE-2025-34333 published?

CVE-2025-34333 was published on 2025-11-19 and last updated on 2026-06-17.

CVE-2025-34333

CVE-2025-34333 is a high-severity vulnerability in Audiocodes Fax Server with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 8.5
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198194
Weakness: CWE-276
Affected product: Audiocodes Fax Server
Published: 2025-11-19
Last modified: 2026-06-17

Description

AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 configure the web document root at C:\\F2MAdmin\\F2E with overly permissive file system permissions. Authenticated local users have modify rights on this directory, while the associated web server process runs as NT AUTHORITY\\SYSTEM. As a result, any local user can create or alter server-side scripts within the webroot and then trigger them via HTTP requests, causing arbitrary code to execute with SYSTEM privileges.

Frequently asked questions

What is CVE-2025-34333?: AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 configure the web document root at C:\\F2MAdmin\\F2E with overly permissive file system permissions. Authenticated local users have modify rights on this directory, while the associated web server process runs as NT AUTHORITY\\SYSTEM. As a result, any local user can create or alter server-side scripts within the webroot and then trigger them via HTTP requests, causing arbitrary code to execute with SYSTEM privileges.
How severe is CVE-2025-34333?: CVE-2025-34333 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-34333 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34333?: CVE-2025-34333 primarily affects Audiocodes Fax Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-34333?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-34333 have an EU (EUVD) identifier?: Yes. CVE-2025-34333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198194.
When was CVE-2025-34333 published?: CVE-2025-34333 was published on 2025-11-19 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:audiocodes:fax_server:*:*:*:*:*:*:*:*
cpe:2.3:a:audiocodes:interactive_voice_response:*:*:*:*:*:*:*:*

More vulnerabilities in Audiocodes Fax Server

CVE-2025-34329 — Critical (CVSS 9.8): AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an unauthenticated…
CVE-2025-34328 — Critical (CVSS 9.8): AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web…
CVE-2025-34335 — High (CVSS 8.8): AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 expose an authenticated…
CVE-2025-34334 — High (CVSS 8.8): AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 are vulnerable to an…
CVE-2025-34332 — High (CVSS 7.8): AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web…
CVE-2025-34331 — High (CVSS 7.5): AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 contain an unauthenticated…

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