Security News > 2023 > June > Fortinet fixes critical RCE flaw in Fortigate SSL-VPN devices, patch now

Fortinet has released new Fortigate firmware updates that fix an undisclosed, critical pre-authentication remote code execution vulnerability in SSL VPN devices.
While not mentioned in the release notes, security professionals and admins have hinted that the updates quietly fixed a critical SSL-VPN RCE vulnerability that would be disclosed on Tuesday, June 13th, 2023.
Fortinet is known to push out security patches prior to disclosing critical vulnerabilities to give customers time to update their devices before threat actors reverse engineer the patches.
Today, additional information was disclosed by vulnerability researcher Charles Fol, who told BleepingComputer that the new FortiOS updates include a fix for a critical RCE vulnerability discovered by him and Rioru.
Fol confirmed to BleepingComputer that this should be considered an urgent patch for Fortinet admins as its likely to be quickly analyzed and discovered by threat actors.
Fortinet devices are some of the most popular firewall and VPN devices in the market, making them a popular target for attacks.
News URL
Related news
- Fortinet Urges FortiSwitch Upgrades to Patch Critical Admin Password Change Flaw (source)
- Fortinet Warns Attackers Retain FortiGate Access Post-Patching via SSL-VPN Symlink Exploit (source)
- Critical Erlang/OTP SSH pre-auth RCE is 'Surprisingly Easy' to exploit, patch now (source)
- Critical Erlang/OTP SSH RCE bug now has public exploits, patch now (source)
- Still Using an Older Version of iOS or iPadOS? Update Now to Patch These Critical Security Vulnerabilities (source)
- Ivanti VPN customers targeted via unrecognized RCE vulnerability (CVE-2025-22457) (source)
- Fortinet: Hackers retain access to patched FortiGate VPNs using symlinks (source)
- Old Fortinet flaws under attack with new method its patch didn't prevent (source)
- Gladinet’s Triofox and CentreStack Under Active Exploitation via Critical RCE Vulnerability (source)
- Critical Commvault RCE vulnerability fixed, PoC available (CVE-2025-34028) (source)