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CVE-2026-12996

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2.6.20版本和2.7_alpha1版本至2.7.4版本存在安全漏洞，该漏洞源于TLS会话提升或过期期间存在释放后重用，可能导致远程认证的对等方通过特制数据包造成拒绝服务或内存泄露。

CVSS 6.0 · Medium EPSS 0.46% · P38

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenVPN OpenVPN 2.6.0≤ 2.6.20 affected
2.7_alpha1≤ 2.7.4 affected
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I. Basic Information for CVE-2026-12996

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
OpenVPN 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenVPN是OpenVPN公司开源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2.6.20版本和2.7_alpha1版本至2.7.4版本存在安全漏洞，该漏洞源于TLS会话提升或过期期间存在释放后重用，可能导致远程认证的对等方通过特制数据包造成拒绝服务或内存泄露。
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 ~ 2.6.20 -

II. Public POCs for CVE-2026-12996

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III. Intelligence Information for CVE-2026-12996

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Same Patch Batch · OpenVPN · 2026-07-30 · 5 CVEs total

CVE-2026-12932 7.1 HIGH OpenVPN 资源管理错误漏洞
CVE-2026-11771 7.0 HIGH OpenVPN 缓冲区错误漏洞
CVE-2026-13117 6.0 MEDIUM OpenVPN 资源管理错误漏洞
CVE-2026-13379 5.1 MEDIUM OpenVPN 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: OpenVPN
Same vendor: OpenVPN
Same weakness: CWE-416

V. Comments for CVE-2026-12996

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