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CVE-2026-11604

Quick assessment

Affected
OpenVPN ovpn-dco-win
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenVPN ovpn-dco-win是OpenVPN公司的一款Windows上的虚拟网络适配器。 OpenVPN ovpn-dco-win 2.0.0版本至2.8.3版本存在安全漏洞，该漏洞源于epoch密钥生成器中缓冲区大小计算错误，可能导致远程已认证对等方通过特制数据包触发堆缓冲区溢出和内核内存损坏。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.34% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenVPN ovpn-dco-win 2.0.0≤ 2.5.8 affected
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I. Basic Information for CVE-2026-11604

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenVPN ovpn-dco-win 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenVPN ovpn-dco-win是OpenVPN公司的一款Windows上的虚拟网络适配器。 OpenVPN ovpn-dco-win 2.0.0版本至2.8.3版本存在安全漏洞，该漏洞源于epoch密钥生成器中缓冲区大小计算错误，可能导致远程已认证对等方通过特制数据包触发堆缓冲区溢出和内核内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenVPN ovpn-dco-win 2.0.0 ~ 2.5.8 -

II. Public POCs for CVE-2026-11604

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-11604

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Vendor Pages for CVE-2026-11604 (1)

IV. Related Vulnerabilities

Same product: ovpn-dco-win
Same vendor: OpenVPN
Same weakness: CWE-131

V. Comments for CVE-2026-11604

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