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CVE-2023-42789 is a critical out-of-bounds write vulnerability in the captive portal component of Fortinet FortiOS, FortiProxy, and FortiSASE. Improper memory-boundary handling when processing specially crafted HTTP requests can permit 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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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
Critical FortiOS and FortiProxy vulnerability involving stack overflow 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 out-of-bounds write in FortiOS/FortiProxy captive portal that can allow an inside attacker with captive portal access to execute arbitrary code/commands via crafted HTTP requests.
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.