Description
The Fortishield.sys driver in Fortinet FortiClient before 5.2.4 allows local users to execute arbitrary code with kernel privileges by setting the callback function in a (1) 0x220024 or (2) 0x220028 ioctl call.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 3
- Fortinet FortiClient 5.2.3 (Windows 10 x64 Creators) - Local Privilege Escalation EDB-45149 · local · Aug 5, 2018 · verified
- Fortinet FortiClient 5.2.3 (Windows 10 x64 Pre-Anniversary) - Local Privilege Escalation EDB-41721 · local · Mar 25, 2017 · verified
- Fortinet FortiClient 5.2.3 (Windows 10 x64 Post-Anniversary) - Local Privilege Escalation EDB-41722 · local · Mar 25, 2017 · verified
GitHub 2 repositories
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avielzecharia/CVE-2015-5736 ★ 2 · Sep 6, 2025
PoC for CVE-2015-5736
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RainbowDynamix/FortiLOL ★ 0 · Sep 9, 2026
FortiClient FortiShield exploit (CVE-2015-5736) for Windows 10 1809
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://www.coresecurity.com/advisories/forticlient-antivirus-multiple-vulnerabilities
- 41722 exploit
- http://packetstormsecurity.com/files/133398/FortiClient-Antivirus-Information-Exposure-Access-Control.html
- 45149 exploit
- 1033439 vdb-entry
- http://www.fortiguard.com/advisory/mulitple-vulnerabilities-in-forticlient
- 41721 exploit
- 20150901 [CORE-2015-0013] - FortiClient Antivirus Multiple Vulnerabilities mailing-list
- http://fortiguard.com/advisory/mulitple-vulnerabilities-in-forticlient
- 20150901 [CORE-2015-0013] - FortiClient Antivirus Multiple Vulnerabilities mailing-list