Fortinet
CISA orders feds to patch exploited Fortinet EMS flaw by Friday
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) ordered federal agencies to secure FortiClient Enterprise Management Server (EMS) instances against an actively exploited vulnerability by Friday. Tracked as CVE-2026-35616, this security flaw was discovered by cybersecurity firm Defused, which described it as a pre-authentication API access bypass that can allow attackers to bypass authentication and […]
New FortiClient EMS flaw exploited in attacks, emergency patch released
Fortinet has released an emergency weekend security update for a new critical FortiClient Enterprise Management Server (EMS) vulnerability that is actively exploited in attacks. Tracked as CVE-2026-35616, the flaw is an improper access control vulnerability that allows unauthenticated attackers to execute code or commands via specially crafted requests. The issue was patched Saturday, with Fortinet […]
Critical Fortinet Forticlient EMS flaw now exploited in attacks
Attackers are now actively exploiting a critical vulnerability in Fortinet’s FortiClient EMS platform, according to threat intelligence company Defused. Tracked as CVE-2026-21643, this SQL injection vulnerability allows unauthenticated threat actors to execute arbitrary code or commands on unpatched systems through low-complexity attacks targeting the FortiClientEMS GUI (web interface) via maliciously crafted HTTP requests. “Fortinet Forticlient EMS […]
Amazon: AI-assisted hacker breached 600 Fortinet firewalls in 5 weeks
Amazon is warning that a Russian-speaking hacker used multiple generative AI services as part of a campaign that breached more than 600 FortiGate firewalls across 55 countries in five weeks. A new report by CJ Moses, CISO of Amazon Integrated Security, says that the hacking campaign occurred between January 11 and February 18, 2026, and did not rely […]
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 […]