CVE-2026-84732
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 在 2.6.22 及 2.7.6 及之前版本中，ACK 数据包 ID 的重传机制允许远程未认证的攻击者通过构造特定输入以触发超时整数溢出，从而导致拒绝服务（DoS）。
Possible ATT&CK Techniques 1 AI
T1074 · Data Staged
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I. Basic Information for CVE-2026-84732
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-84732
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-84732 (1)
Same Patch Batch · OpenVPN · 2026-09-07 · 8 CVEs total
| CVE-2026-84226 | 8.5 HIGH | OpenVPN 2.5.0-2.7.6 Windows 本地二进制植入 |
| CVE-2026-84256 | 7.7 HIGH | OpenVPN 2.1至2.7 Windows参数解析远程命令执行 |
| CVE-2026-78221 | 5.9 MEDIUM | OpenVPN 2.7.6 Windows版缓冲区溢出漏洞 |
| CVE-2026-78043 | 5.6 MEDIUM | OpenVPN 2.7.6 Windows服务本地配置路径绕过 |
| CVE-2026-81830 | 5.6 MEDIUM | OpenVPN 2.4.0-2.6.22 本地服务配置目录约束绕过 |
| CVE-2026-81738 | 2.3 LOW | OpenVPN 2.5.0-2.7.6 Windows版越界写漏洞 |
| CVE-2026-82312 | 1.8 LOW | OpenVPN 2.7.6 Windows IPC空描述符拒绝服务 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-84732
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