CVE-2025-34238Network attack vector

Authenticated file disclosure via absolute path traversal

Published Nov 6, 2025 · Updated Nov 6, 2025

Absolute path traversal in Advantech WebAccess/VPN before 1.1.5 allows remote authenticated users to read arbitrary server files. AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction() accepts an absolute path without confining it to the intended configuration directory and returns the referenced file. Network-administrator privileges are required, and disclosure is limited to files readable by the www-data account.

CVSS severity6.9
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Absolute path traversal in Advantech WebAccess/VPN before 1.1.5 allows remote authenticated users to read arbitrary server files. AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction() accepts an absolute path without confining it to the intended configuration directory and returns the referenced file. Network-administrator privileges are required, and disclosure is limited to files readable by the www-data account.

The record

CVE
CVE-2025-34238
Published
Nov 6, 2025
Updated
Nov 6, 2025
Vendor
Advantech
Product
WebAccess/VPN
Classifications
CWE-22, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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 <1.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Advantech · WebAccess/VPNversion=0 <1.1.5

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.9AdvantechCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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