OpenVPN is widely deployed for corporate VPNs; a remote DoS can disrupt employee connectivity and business operations.
CVE-2026-84732
OpenVPN ACK retransmission integer overflow leading to remote DoS.
Is CVE-2026-84732 being exploited?
Not confirmed. CVE-2026-84732 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.54% probability of exploitation in the next 30 days.
How severe is CVE-2026-84732?
CVE-2026-84732 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-84732?
Yes. A fix has been recorded for CVE-2026-84732. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-84732 affect?
CVE-2026-84732 affects OpenVPN <= 2.6.22, OpenVPN <= 2.7.6. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-84732?
Update OpenVPN to vendor-patched versions, restart services and monitor VPN logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated attacker can send crafted ACK retransmissions to trigger a timeout integer overflow and cause OpenVPN service denial.
Patch when possible
- affected<= 2.6.22
- affected<= 2.7.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.