Fortinet2Shell Vulnerability Lets Hackers Execute Code on FortiClient Systems Through Malicious Websites

Fortinet has patched a critical flaw in FortiClient that lets attackers run code on a victim’s computer through a malicious website. The bug is tracked as CVE-2026-121529 (advisory FG-IR-26-194). Researcher Kevin Joensen of Baldur Security reported it and nicknamed it “Fortinet2Shell.” Attackers have targeted Fortinet endpoint tools before, as seen in a FortiClient code execution […]

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