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CVE-2026-19318 is a pre-authentication stack-based buffer overflow (CWE-121) in the iked Internet Key Exchange/IPsec VPN daemon of WatchGuard Fireware OS. Improper handling of specially crafted VPN network traffic, reported as a malformed EAP-MSCHAPv2 payload, can overwrite stack memory and allow a remote unauthenticated attacker to execute arbitrary code.
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No public exploit code observed for this vulnerability.
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12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical unauthenticated stack-based buffer overflow in Fireware OS's iked IKE/IPsec VPN daemon that can allow remote code execution via crafted network traffic.
Kritische Schwachstelle in WatchGuard Firebox OS, die im Kontext der vier kritischen Lücken unauthentifizierte Remote-Code-Ausführung oder Denial-of-Service ermöglichen kann.
Critical pre-authentication stack buffer overflow in WatchGuard Fireware OS iked VPN service, reachable through malformed EAP-MSCHAPv2 traffic, that permits remote code execution.
A stack-based buffer overflow in the WatchGuard Fireware OS iked process that permits remote, unauthenticated arbitrary code execution through specially crafted network traffic.
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.