Vulnerability · Published Sep 7, 2026 · Assigned by OpenVPN
CVE-2026-84732
High 8.7
In plain English
A high-severity integer overflow in OpenVPN from OpenVPN. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.3%top 72.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | openvpn | 2.7.7-r0 | ALPINE-CVE-2026-84732 |
| Debian:12 | openvpn | no fix listed | DEBIAN-CVE-2026-84732 |
| Debian:13 | openvpn | no fix listed | DEBIAN-CVE-2026-84732 |
| Debian:14 | openvpn | 2.7.7-1 | DEBIAN-CVE-2026-84732 |
| Ubuntu:22.04:LTS | openvpn | 2.5.11-0ubuntu0.22.04.5 | UBUNTU-CVE-2026-84732 |
| Ubuntu:22.04:LTS | openvpn | 2.5.11-0ubuntu0.22.04.5 | USN-8852-1 |
| Ubuntu:24.04:LTS | openvpn | 2.6.19-0ubuntu0.24.04.4 | USN-8852-1 |
| Ubuntu:24.04:LTS | openvpn | 2.6.19-0ubuntu0.24.04.4 | UBUNTU-CVE-2026-84732 |
| Ubuntu:26.04:LTS | openvpn | 2.7.0-1ubuntu1.3 | USN-8852-1 |
| Ubuntu:26.04:LTS | openvpn | 2.7.0-1ubuntu1.3 | UBUNTU-CVE-2026-84732 |
Affected products (as reported)
Weakness: CWE-190 · Vector: 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