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CVE-2026-84732 is an integer-overflow vulnerability in the OpenVPN 2.x control-channel reliability layer. Improper handling of retransmitted ACK packet identifiers for packets that cannot legitimately be outstanding, combined with an unbounded reliable TLS retransmission timeout, permits crafted network inputs to drive timeout handling into an overflow condition. The issue affects OpenVPN releases through 2.6.22 and through 2.7.6.
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No public exploit code observed for this vulnerability.
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10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenVPN reliability-layer vulnerability involving unbounded TLS timeouts and acknowledgements for packets that are not outstanding. The notice identifies OpenVPN versions 2.6.22 and earlier, and 2.7.6 and earlier, as affected.
A cross-platform OpenVPN reliability-layer flaw that can cause denial of service through TLS handshake and acknowledgment-packet mishandling.
A cross-platform OpenVPN reliability-layer flaw involving an unbounded reliable TLS timeout and acknowledgment handling for packets that cannot legitimately be outstanding, creating a potential denial-of-service condition during TLS handshakes.
A remote unauthenticated denial-of-service vulnerability in OpenVPN caused by a timeout integer overflow triggered through crafted retransmissions of an ACK packet ID.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.