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CVE-2026-81830

Quick assessment

Affected
OpenVPN OpenVPN
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是OpenVPN公司开源的一款虚拟专用网络软件。 OpenVPN 2.4.0版本至2.6.22版本存在输入验证错误漏洞，该漏洞源于Windows交互服务对文件路径的验证不正确，可能导致本地经过身份验证的用户绕过受信任的配置目录约束。

CVSS 5.6 · Medium EPSS 0.15% · P4

Possible ATT&CK Techniques 2 AI

T1562 T1548.001 · Setuid and Setgid

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenVPN OpenVPN 2.4.0≤ 2.6.22 affected
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I. Basic Information for CVE-2026-81830

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The Windows interactive service in OpenVPN 2.4.0 through 2.6.22 allows local authenticated users to bypass the trusted configuration directory constraint via incorrect file path validation
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
OpenVPN 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenVPN是OpenVPN公司开源的一款虚拟专用网络软件。 OpenVPN 2.4.0版本至2.6.22版本存在输入验证错误漏洞，该漏洞源于Windows交互服务对文件路径的验证不正确，可能导致本地经过身份验证的用户绕过受信任的配置目录约束。
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 OpenVPN 2.4.0 ~ 2.6.22 -

II. Public POCs for CVE-2026-81830

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III. Intelligence Information for CVE-2026-81830

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Same Patch Batch · OpenVPN · 2026-09-07 · 9 CVEs total

CVE-2026-84732 8.7 HIGH OpenVPN 数字错误漏洞
CVE-2026-84226 8.5 HIGH OpenVPN 权限许可和访问控制问题漏洞
CVE-2026-84256 7.7 HIGH OpenVPN 命令注入漏洞
CVE-2026-82325 6.8 MEDIUM OpenVPN ovpn-dco-win 资源管理错误漏洞
CVE-2026-78221 5.9 MEDIUM OpenVPN 缓冲区错误漏洞
CVE-2026-78043 5.6 MEDIUM OpenVPN 路径遍历漏洞
CVE-2026-81738 2.3 LOW OpenVPN 缓冲区错误漏洞
CVE-2026-82312 1.8 LOW OpenVPN 资源管理错误漏洞

IV. Related Vulnerabilities

Same product: OpenVPN
Same vendor: OpenVPN
Same weakness: CWE-73

V. Comments for CVE-2026-81830

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