How severe is CVE-2025-34239?

CVE-2025-34239 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-34239 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34239?

CVE-2025-34239 affects Advantech Webaccess/vpn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34239?

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-2025-34239 have an EU (EUVD) identifier?

Yes. CVE-2025-34239 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38166.

When was CVE-2025-34239 published?

CVE-2025-34239 was published on 2025-11-06 and last updated on 2026-06-17.

CVE-2025-34239

CVE-2025-34239 is a high-severity vulnerability in Advantech Webaccess/vpn with a CVSS 3.x base score of 7.2. 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v4: 8.6
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-38166
Weakness: CWE-78
Affected product: Advantech Webaccess/vpn
Published: 2025-11-06
Last modified: 2026-06-17

Description

Advantech WebAccess/VPN versions prior to 1.1.5 contain a command injection vulnerability in AppManagementController.appUpgradeAction() that allows an authenticated system administrator to execute arbitrary commands as the web server user (www-data) by supplying a crafted uploaded filename.

Frequently asked questions

What is CVE-2025-34239?: Advantech WebAccess/VPN versions prior to 1.1.5 contain a command injection vulnerability in AppManagementController.appUpgradeAction() that allows an authenticated system administrator to execute arbitrary commands as the web server user (www-data) by supplying a crafted uploaded filename.
How severe is CVE-2025-34239?: CVE-2025-34239 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-34239 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34239?: CVE-2025-34239 affects Advantech Webaccess/vpn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34239?: 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-2025-34239 have an EU (EUVD) identifier?: Yes. CVE-2025-34239 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-38166.
When was CVE-2025-34239 published?: CVE-2025-34239 was published on 2025-11-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:advantech:webaccess\/vpn:*:*:*:*:*:*:*:*

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