Which versions of ASUSTOR ADM are affected by CVE-2026-67245?

CVE-2026-67245 affects ASUSTOR ADM NAS systems, allowing authenticated administrators to perform arbitrary file writes outside intended certificate directories via directory traversal.

How to fix or mitigate CVE-2026-67245?

Within 24 hours, audit all ASUSTOR ADM deployments in your environment and restrict administrative access to VPN certificate upload functions to essential personnel only. Within 7 days, enable comprehensive audit logging for all VPN client operations, review administrator activity logs for suspicious certificate uploads, and check ASUSTOR security advisories for interim mitigation guidance. Within 30 days, monitor ASUSTOR releases for a vendor patch; apply immediately upon availability to all affected ADM systems. Until patched, consider disabling VPN client functionality if not operationally required, or implement network-level isolation for affected systems.

ASUSTOR ADM CVE-2026-67245

Q: What is the CVSS score of CVE-2026-67245?

CVE-2026-67245 has a CVSS 4.0 base score of 7.0 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.2%.

EUVD-2026-50962 HIGH

Path Traversal (CWE-22)

2026-07-30 ASUSTOR1

GHSA-mch2-xj8c-9424

Path Traversal Adm Asustor Inc

7.0

CVSS 4.0 · Vendor: ASUSTOR1

Severity by source

Vendor (ASUSTOR1) PRIMARY

7.0 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vuln.today AI

6.5 MEDIUM

Network-reachable upload but requires an authenticated high-privilege ADM account (PR:H); arbitrary file write yields integrity and availability impact with no data disclosure (C:N).

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (ASUSTOR1).

CVSS VectorVendor: ASUSTOR1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jul 30, 2026 - 04:51 vuln.today

CVE Published

Jul 30, 2026 - 03:29 cve.org

HIGH 7.0

DescriptionCVE.org

A path traversal vulnerability was found in the VPN Clients on the ADM. The vulnerability occurs because user-controlled certificate name input is not sufficiently validated before being used to construct the upload destination path. An authenticated attacker can exploit this issue to write an uploaded certificate file outside the intended VPN certificate directory, subject to process privileges and filesystem permissions. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RUN1 as well as from ADM 5.0.0 through ADM 5.1.3.RI81.

AnalysisAI

Arbitrary file write in the VPN Client component of ASUSTOR ADM (the ADM NAS operating system) lets an authenticated, high-privileged attacker place uploaded certificate files outside the intended VPN certificate directory. The flaw stems from insufficient validation of the user-supplied certificate name when building the upload destination path, enabling directory traversal (CWE-22). No public exploit identified at time of analysis; the issue is not listed in CISA KEV and no POC is referenced.

Technical ContextAI

ADM (ASUSTOR Data Master) is the Linux-based operating system running on ASUSTOR network-attached storage appliances, and the affected surface is its built-in VPN Client feature, which accepts user-uploaded certificate files. The root cause is CWE-22 (Improper Limitation of a Pathname to a Restricted Directory): the certificate name supplied by the operator is concatenated into the filesystem upload path without adequately neutralizing traversal sequences such as '../', so the resulting path can resolve outside the intended VPN certificate store. The single CPE provided (cpe:2.3:a:asustor_inc.:adm:*:*:*:*:*:*:*:*) confirms the affected software is the ADM platform itself rather than a specific third-party library.

RemediationAI

Upgrade ADM to a release beyond the affected bands as directed by the vendor; the ASUSTOR advisory at https://www.asustor.com/security/security_advisory_detail?id=68 is the authoritative source for the exact fixed build for each model (a specific fix version was not included in the provided data, so verify it there before deploying - do not assume a version). Patch available per vendor advisory. Until patched, reduce exposure by restricting who holds high-privilege ADM accounts (the PR:H prerequisite), disabling or not configuring the VPN Client feature if it is unused, and limiting network reachability of the ADM administration interface to trusted management networks or VPN - noting the trade-off that disabling VPN Client removes that functionality and restricting the admin interface may complicate remote management.