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CVE Vulnerability Details :
CVE-2026-11604
PUBLISHED
More InfoOfficial Page
Assigner-OpenVPN
Assigner Org ID-36a55730-e66d-4d39-8ca6-3c3b3017965e
View Known Exploited Vulnerability (KEV) details
Published At-10 Jun, 2026 | 21:04
Updated At-11 Jun, 2026 | 13:27
Rejected At-
▼CVE Numbering Authority (CNA)

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 Products
Vendor
OpenVPN
Product
ovpn-dco-win
Platforms
  • Windows
Default Status
unaffected
Versions
Affected
  • From 2.0.0 through 2.5.8 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-131CWE-131 Incorrect calculation of buffer size
CWECWE-122CWE-122 Heap-based buffer overflow
CWECWE-787CWE-787 Out-of-bounds write
Type: CWE
CWE ID: CWE-131
Description: CWE-131 Incorrect calculation of buffer size
Type: CWE
CWE ID: CWE-122
Description: CWE-122 Heap-based buffer overflow
Type: CWE
CWE ID: CWE-787
Description: CWE-787 Out-of-bounds write
Metrics
VersionBase scoreBase severityVector
4.05.6MEDIUM
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Version: 4.0
Base score: 5.6
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/OpenVPN/ovpn-dco-win/releases
product
https://community.openvpn.net/Security%20Announcements/CVE-2026-11604
vendor-advisory
Hyperlink: https://github.com/OpenVPN/ovpn-dco-win/releases
Resource:
product
Hyperlink: https://community.openvpn.net/Security%20Announcements/CVE-2026-11604
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found