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CVE-2026-88964

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.

在 Windows 和 Android 平台上的 OpenVPN 版本 2.7_alpha3 到 2.7.7 中存在一个整数下溢漏洞，允许远程经过身份验证的服务器通过精心构造的域名搜索选项导致拒绝服务或内存信息泄露。

CVSS 7.1 · High EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenVPN OpenVPN 2.7_alpha3≤ 2.7.7 affected
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I. Basic Information for CVE-2026-88964

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows remote authenticated servers to cause a denial of service or memory disclosure via crafted domain search options
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenVPN OpenVPN 2.7_alpha3 ~ 2.7.7 -

II. Public POCs for CVE-2026-88964

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-88964

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Vendor Advisories for CVE-2026-88964 (1)

Same Patch Batch · OpenVPN · 2026-10-13 · 3 CVEs total

CVE-2026-84790 7.6 HIGH OpenVPN 2.3.0-2.6.22及2.7版身份伪造漏洞
CVE-2026-105390 6.9 MEDIUM OpenVPN ovpn-dco-win 同步缺陷致死锁

IV. Related Vulnerabilities

Same product: OpenVPN
Same vendor: OpenVPN
Same weakness: CWE-191

V. Comments for CVE-2026-88964

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