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Ovpn Dco Win EUVD-2025-18726

| CVE-2025-50054 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2025-06-20 security@openvpn.net
Buffer Overflow Heap Overflow Ovpn Dco Win
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch available
Apr 16, 2026 - 05:29 EUVD
2.5.9,1.3.1
EUVD ID Assigned
Mar 15, 2026 - 00:19 euvd
EUVD-2025-18726
Analysis Generated
Mar 15, 2026 - 00:19 vuln.today
CVE Published
Jun 20, 2025 - 07:15 nvd
MEDIUM 5.5

DescriptionCVE.org

Buffer overflow in OpenVPN ovpn-dco-win version 1.3.0 and earlier and version 2.5.8 and earlier allows a local user process to send a too large control message buffer to the kernel driver resulting in a system crash

Analysis

Buffer overflow in OpenVPN ovpn-dco-win version 1.3.0 and earlier and version 2.5.8 and earlier allows a local user process to send a too large control message buffer to the kernel driver resulting in a system crash

Technical ContextAI

A buffer overflow occurs when data written to a buffer exceeds its allocated size, potentially overwriting adjacent memory and corrupting program state. This vulnerability is classified as Heap-based Buffer Overflow (CWE-122).

RemediationAI

Use memory-safe languages or bounds-checked functions. Enable ASLR, DEP/NX, and stack canaries. Apply vendor patches promptly.

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EUVD-2025-18726 vulnerability details – vuln.today
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