How severe is CVE-2025-34330?

CVE-2025-34330 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-34330 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34330?

CVE-2025-34330 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-2025-34330?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-34330 have an EU (EUVD) identifier?

Yes. CVE-2025-34330 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198188.

When was CVE-2025-34330 published?

CVE-2025-34330 was published on 2025-11-19 and last updated on 2026-06-17.

CVE-2025-34330

CVE-2025-34330 is a medium-severity vulnerability in Audiocodes Fax Server with a CVSS 3.x base score of 5.3. 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-434.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 6.9
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198188
Weakness: CWE-434
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 include a web administration component (F2MAdmin) that exposes an unauthenticated prompt upload endpoint at AudioCodes_files/utils/IVR/diagram/ajaxPromptUploadFile.php. The script accepts an uploaded file and writes it into the C:\\F2MAdmin\\tmp directory using a filename derived from application constants, without any authentication, authorization, or file-type validation. A remote, unauthenticated attacker can upload or overwrite prompt- or music-on-hold–related files in this directory, potentially leading to tampering with IVR audio content or preparing files for use in further attacks.

Frequently asked questions

What is CVE-2025-34330?: AudioCodes Fax Server and Auto-Attendant IVR appliances versions up to and including 2.6.23 include a web administration component (F2MAdmin) that exposes an unauthenticated prompt upload endpoint at AudioCodes_files/utils/IVR/diagram/ajaxPromptUploadFile.php. The script accepts an uploaded file and writes it into the C:\\F2MAdmin\\tmp directory using a filename derived from application constants, without any authentication, authorization, or file-type validation. A remote, unauthenticated attacker can upload or overwrite prompt- or music-on-hold–related files in this directory, potentially leading to tampering with IVR audio content or preparing files for use in further attacks.
How severe is CVE-2025-34330?: CVE-2025-34330 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-34330 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34330?: CVE-2025-34330 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-2025-34330?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-34330 have an EU (EUVD) identifier?: Yes. CVE-2025-34330 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198188.
When was CVE-2025-34330 published?: CVE-2025-34330 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…
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