Fortinet
Fortinet blocks exploited FortiCloud SSO zero day until patch is ready
Fortinet has confirmed a new, actively exploited critical FortiCloud single sign-on (SSO) authentication bypass vulnerability, tracked as CVE-2026-24858, and says it has mitigated the zero-day attacks by blocking FortiCloud SSO connections from devices running vulnerable firmware versions. The flaw allows attackers to abuse FortiCloud SSO to gain administrative access to FortiOS, FortiManager, and FortiAnalyzer devices registered […]
Fortinet confirms critical FortiCloud auth bypass not fully patched
Days after admins began reporting that their fully patched firewalls are being hacked, Fortinet confirmed it’s working to fully address a critical FortiCloud SSO authentication bypass vulnerability that should have already been patched since early December. This comes after a wave of reports from Fortinet customers about threat actors exploiting a patch bypass for the CVE-2025-59718 vulnerability to […]
Hackers breach Fortinet FortiGate devices, steal firewall configs
Fortinet FortiGate devices are being targeted in automated attacks that create rogue accounts and steal firewall configuration data, according to cybersecurity company Arctic Wolf. The campaign started last week, on January 15, with the attackers exploiting an unknown vulnerability in the devices’ single sign-on (SSO) feature to create accounts with VPN access and exporting firewall configurations […]
Fortinet admins report patched FortiGate firewalls getting hacked
Fortinet customers are seeing attackers exploiting a patch bypass for a previously fixed critical FortiGate authentication vulnerability (CVE-2025-59718) to hack patched firewalls. Until Fortinet provides a fully patched FortiOS release, admins are advised to temporarily disable the vulnerable FortiCloud login feature (if enabled) to secure their systems against attacks. To disable FortiCloud login, you have […]
Hackers now exploiting critical Fortinet FortiSIEM flaw in attacks
A critical Fortinet FortiSIEM vulnerability with publicly available proof-of-concept exploit code is now being abused in attacks. According to security researcher Zach Hanley at penetration testing company Horizon3.ai, who reported the vulnerability (CVE-2025-64155), it is a combination of two issues that allow arbitrary writes with admin permissions and privilege escalation to root access. “An improper […]
Exploit code public for critical FortiSIEM command injection flaw
Technical details and a public exploit have been published for a critical vulnerability affecting Fortinet’s Security Information and Event Management (SIEM) solution that could be leveraged by a remote, unauthenticated attacker to execute commands or code. The vulnerability is tracked as CVE-2025-25256, and is a combination of two issues that permit arbitrary write with admin permissions […]
Over 10K Fortinet firewalls exposed to actively exploited 2FA bypass
Over 10,000 Fortinet firewalls are still exposed online and vulnerable to ongoing attacks exploiting a five-year-old critical two-factor authentication (2FA) bypass vulnerability. Fortinet released FortiOS versions 6.4.1, 6.2.4, and 6.0.10 in July 2020 to address this flaw (tracked as CVE-2020-12812) and advised admins who couldn’t immediately patch to turn off username-case-sensitivity to block 2FA bypass attempts […]
Fortinet warns of 5-year-old FortiOS 2FA bypass still exploited in attacks
Fortinet has warned customers that threat actors are still actively exploiting a critical FortiOS vulnerability that allows them to bypass two-factor authentication (2FA) when targeting vulnerable FortiGate firewalls. Tracked as CVE-2020-12812, this improper authentication security flaw was found in FortiGate SSL VPN and enables attackers to log in to unpatched firewalls without being prompted for the […]
Over 25,000 FortiCloud SSO devices exposed to remote attacks
Internet security watchdog Shadowserver has found over 25,000 Fortinet devices exposed online with FortiCloud SSO enabled, amid ongoing attacks targeting a critical authentication bypass vulnerability. Fortinet noted on December 9th, when it patched the security flaw tracked as CVE-2025-59718 (FortiOS, FortiProxy, FortiSwitchManager) and CVE-2025-59719 (FortiWeb), that the vulnerable FortiCloud SSO login feature is not enabled until admins […]
Hackers exploit newly patched Fortinet auth bypass flaws
Hackers are exploiting critical-severity vulnerabilities affecting multiple Fortinet products to get unauthorized access to admin accounts and steal system configuration files. The two vulnerabilities are tracked as CVE-2025-59718 and CVE-2025-59719, and Fortinet warned in an advisory on December 9 about the potential for exploitation. CVE-2025-59718 is a FortiCloud SSO authentication bypass affecting FortiOS, FortiProxy, and FortiSwitchManager. It is […]