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CVE-2026-81433 is a stack-based buffer overflow in the DHCP fingerprinting daemon, fingerd, in WatchGuard Fireware OS. An unauthenticated attacker on an adjacent network can send a specially crafted DHCP packet to trigger the flaw, resulting in arbitrary code execution or a crash of the affected daemon process.
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What an attacker gets, and what they’ve been doing with it.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity stack-based buffer overflow in the Fireware OS DHCP fingerprinting daemon, fingerd. An unauthenticated adjacent-network attacker can send a crafted DHCP packet to achieve arbitrary code execution or crash the process.
A stack-based buffer overflow in the DHCP fingerprinting daemon (fingerd) of WatchGuard Fireware OS. An unauthenticated adjacent-network attacker can send a crafted DHCP packet to achieve arbitrary code execution or cause a denial of service.
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.