Vulnerability DatabaseCVE-2026-11604
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CVE-2026-11604
Published:June 10, 2026
Updated:June 28, 2026
An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).
Affected Packages
https://github.com/OpenVPN/ovpn-dco-win.git (GITHUB):
Affected version(s) >=2.4.0 <2.8.3
Fix Suggestion:
Update to version 2.8.3
Related Resources (2)
https://github.com/OpenVPN/ovpn-dco-win/releases
https://community.openvpn.net/Security%20Announcements/CVE-2026-11604
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CVSS v4
Base Score:
5.6
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
HIGH
CVSS v3
Base Score:
5.3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write
CWE-787
Incorrect Calculation of Buffer Size
CWE-131
Heap-based Buffer Overflow
CWE-122
EPSS
Base Score:
0.15