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OpenVPN tapctl CVE-2026-84226

| EUVDEUVD-2026-72283 HIGH
Untrusted Search Path (CWE-426)
2026-09-03 GHSA-hg4r-p3wj-49qf
Red Hat Openvpn Suse
8.5
CVSS 4.0 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
8.5 HIGH
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/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
7.0 HIGH

AV:L and PR:L for local authenticated access; AC:H because exploitation depends on a user-writable directory preceding System32 in PATH, a non-default condition.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
7.3 HIGH
AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Red Hat
7.8 HIGH
qualitative

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

7
Metadata Corrected
Sep 07, 2026 - 08:40 vuln.today
tag: Openvpn added
Metadata Corrected
Sep 07, 2026 - 08:40 vuln.today
tag: Microsoft removed
Metadata Corrected
Sep 07, 2026 - 08:40 vuln.today
tag: Information Disclosure removed
Source Code Evidence Fetched
Sep 07, 2026 - 08:28 vuln.today
Analysis Generated
Sep 07, 2026 - 08:28 vuln.today
CVE Published
Sep 03, 2026 - 18:09 github-releases
HIGH 8.5
CVE Published
Sep 03, 2026 - 18:09 github-releases
UNKNOWN (no severity yet)

Description PRE-NVD

Disclosed via GitHub release of openvpn/openvpn. NVD scoring and full description are pending.

AnalysisAI

Untrusted search path (CWE-426) in OpenVPN's Windows tapctl utility allows a local low-privileged attacker to substitute a malicious netsh.exe executable when tapctl invokes it without a fully-qualified path. Affected versions span OpenVPN 2.5.0-2.6.22 and 2.7_alpha1-2.7.6 on Windows; the fix was released in v2.7.7. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires: (1) a Windows endpoint running OpenVPN 2.5.0-2.6.22 or 2.7_alpha1-2.7.6; (2) local, authenticated access with at least low-privilege (standard user) permissions; (3) the ability to write an executable named netsh.exe into a directory that appears before C:\Windows\System32 in the effective PATH - this is the primary limiting condition and is absent on properly hardened Windows systems with locked-down PATH directories. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) scores 8.5 and reflects local access with low-privilege requirements and high impact across all three pillars. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to OpenVPN v2.7.7 on all Windows endpoints; this release fixes the tapctl full-path issue and four additional Windows-specific vulnerabilities documented in the same advisory. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Windows systems running OpenVPN and document their current versions; contact vendors or check official OpenVPN announcements for affected deployments. …

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Same weakness CWE-426 – Untrusted Search Path

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 12 Not-Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Not-Affected
SUSE Linux Enterprise Server 15 SP7 Not-Affected
SUSE Linux Enterprise Server 16.0 Not-Affected

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CVE-2026-84226 vulnerability details – vuln.today
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