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CVE-2025-53844 is an out-of-bounds write vulnerability in the CAPWAP daemon of Fortinet FortiOS. It affects FortiOS 7.6.0 through 7.6.3, 7.4.0 through 7.4.8, and 7.2.0 through 7.2.11. The flaw arises from improper bounds validation when the daemon processes crafted CAPWAP traffic, allowing memory corruption. An attacker that controls an authenticated managed edge device communicating with the FortiGate over CAPWAP can send specially crafted packets to trigger the condition. Successful exploitation can crash the vulnerable process or lead to unauthorized code or command execution on the FortiGate appliance.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity out-of-bounds write flaw in the FortiOS CAPWAP daemon that could let an attacker controlling an authenticated Fortinet access point endpoint crash or compromise the FortiOS process.
A medium-severity out-of-bounds write vulnerability in the FortiOS CAPWAP daemon that could let an attacker controlling an access point endpoint crash or potentially compromise the FortiOS process.
An out-of-bounds write vulnerability in the FortiOS CAPWAP daemon that allows an attacker controlling an authenticated managed edge device to execute arbitrary code on the central FortiGate appliance.
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.