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CVE-2026-35058

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是美国OpenVPN公司的一个用于创建虚拟专用网络（VPN）加密通道的软件包，它使用OpenSSL库来加密数据与控制信息，并允许创建的VPN使用公开密钥、电子证书或者用户名/密码来进行身份验证。 OpenVPN 2.6.0版本至2.6.19版本和2.7_alpha1版本至2.7.1版本存在安全漏洞，该漏洞源于tls-crypt-v2密钥提取过程中数据包长度验证不当，可能导致经过身份验证的攻击者通过特制数据包触发致命断言并造成拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.60% · P48

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenVPN OpenVPN 2.6.0≤ 2.6.19 affected
2.7_alpha1≤ 2.7.1 affected
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I. Basic Information for CVE-2026-35058

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/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
可达断言
Source: CVE Program / CVE List V5
Vulnerability Title
OpenVPN 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenVPN是美国OpenVPN公司的一个用于创建虚拟专用网络（VPN）加密通道的软件包，它使用OpenSSL库来加密数据与控制信息，并允许创建的VPN使用公开密钥、电子证书或者用户名/密码来进行身份验证。 OpenVPN 2.6.0版本至2.6.19版本和2.7_alpha1版本至2.7.1版本存在安全漏洞，该漏洞源于tls-crypt-v2密钥提取过程中数据包长度验证不当，可能导致经过身份验证的攻击者通过特制数据包触发致命断言并造成拒绝服务。
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 2.6.0 ~ 2.6.19 -

II. Public POCs for CVE-2026-35058

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III. Intelligence Information for CVE-2026-35058

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IV. Related Vulnerabilities

Same product: OpenVPN
Same vendor: OpenVPN
Same weakness: CWE-617

V. Comments for CVE-2026-35058

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