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CVE-2023-42790 is a stack-based buffer overflow in the captive portal component of Fortinet FortiOS, FortiProxy, and FortiSASE. Specially crafted HTTP requests sent to the captive portal can corrupt stack memory and result in execution of unauthorized code or commands. Affected releases include FortiOS 7.4.0-7.4.1, 7.2.0-7.2.5, 7.0.0-7.0.12, 6.4.0-6.4.14, and 6.2.0-6.2.15; FortiProxy 7.4.0, 7.2.0-7.2.6, 7.0.0-7.0.12, and 2.0.0-2.0.13; and FortiSASE 23.2.b.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical vulnerability in the FortiOS and FortiProxy captive portal that can allow arbitrary code or command execution via specially crafted HTTP requests.
High-severity FortiOS and FortiProxy vulnerability involving out-of-bounds memory write that can allow arbitrary code or command execution via crafted HTTP requests.
A high-severity FortiOS and FortiProxy vulnerability that allows an attacker with access to the captive portal to execute arbitrary code.
A critical stack-based buffer overflow in FortiOS/FortiProxy captive portal enabling arbitrary code/command execution by an inside attacker with captive portal access.
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.