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OpenVPN EUVDEUVD-2026-72296

| CVE-2026-84256 HIGH
OS Command Injection (CWE-78)
2026-09-03 GHSA-j4fj-57fp-j5mr
Command Injection Red Hat Suse
7.7
CVSS 4.0 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
7.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/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
7.5 HIGH

AC:H reflects rogue-CA prerequisite beyond attacker control; PR:L for authenticated VPN peer; S:U consistent with impact on the OpenVPN host system itself.

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

Primary rating from Vendor (CNA).

CVSS VectorVendor

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

Lifecycle Timeline

6
Metadata Corrected
Sep 07, 2026 - 08:40 vuln.today
tag: Microsoft removed
Source Code Evidence Fetched
Sep 07, 2026 - 08:23 vuln.today
Analysis Generated
Sep 07, 2026 - 08:23 vuln.today
CVSS changed
Sep 07, 2026 - 08:22 NVD
7.7 (HIGH)
CVE Published
Sep 03, 2026 - 18:09 github-releases
HIGH 7.7
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

Command injection in OpenVPN for Windows allows a low-privilege attacker - operating through a rogue CA combined with a configured validation script - to inject arbitrary commands via improperly quoted CreateProcess() arguments that include characters special to cmd.exe. Affected is OpenVPN prior to v2.7.7 on Windows platforms only. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Two conditions must both be present: (1) A validation script must be configured in OpenVPN - specifically a tls-verify, auth-user-pass-verify, or similar script directive that causes OpenVPN to invoke an external process via CreateProcess() during connection handling. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:L) scores 7.7 and is broadly defensible: the attack originates over the network, requires low (peer-level) privileges, and AT:P captures the prerequisite that a validation script must be configured. … 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 or later, which corrects the CreateProcess() command-line quoting for cmd.exe-special characters. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify and inventory all Windows systems running OpenVPN versions prior to 2.7.7 across your VPN infrastructure. …

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Same weakness CWE-78 – OS Command Injection

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Same technique Command Injection

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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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EUVD-2026-72296 vulnerability details – vuln.today
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