OpenVPN security advisory (AV26-889)
Serial Number: AV26-889 Date: September 8, 2026 As of September 7, 2026, OpenVPN is affected by vulnerabilities in the following product: OpenVPN Prior to or equal to 2.6.22 Prior to or equal to 2.7.6 The Cyber Centre encourages users and administrators to review the provided web links and apply any necessary updates as they become available. CVE-2026-84732 - Reliability layer unbounded TLS timeout and acks for non-outstanding packets Security Advisories & Updates | OpenVPN
Details
Original advisory: https://cyber.gc.ca/en/alerts-advisories/openvpn-security-advisory-av26-889
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-847320.54% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-84732 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
More from Canadian Centre for Cyber Security
- unknownFortra security advisory (AV26-906)2026-09-10
- unknownPalo Alto Networks security advisory (AV26-905)2026-09-10
- unknownAL26-019 - Vulnerabilities impacting Citrix NetScaler ADC and NetScaler Gateway - CVE-2026-19490 and CVE-2026-…2026-09-09
- unknownCitrix security advisory (AV26-833) - Update 12026-09-09
- criticalCisco security advisory (AV26-197) – Update 32026-09-09