ALL POSTS

Key Findings: Fortinet has released security updates to address a critical flaw (CVE-2026-24858, CVSS 9.4) impacting FortiOS, FortiManager, and FortiAnalyzer. The vulnerability is an authentication bypass related to the FortiCloud single sign-on (SSO) feature, which can allow an attacker with a FortiCloud account and a registered device to access other devices registered to different accounts. The vulnerability is actively being exploited in the wild, with Fortinet confirming

Key Findings Fortinet confirmed attacks are bypassing FortiCloud SSO authentication, affecting even fully patched devices, similar to recent SSO flaws. Threat actors automate firewall changes, add users, enable VPNs, and steal configs, in campaigns resembling December 2025 exploits of critical FortiCloud SSO flaws. Arctic Wolf researchers reported a new automated attack cluster observed since January 15, 2026, targeting FortiGate devices. Attackers created generic accounts fo

Key Findings Arctic Wolf observed a new cluster of automated malicious activity targeting Fortinet FortiGate firewalls since January 15, 2026. The attacks involve the creation of generic user accounts for persistence, configuration changes granting VPN access to those accounts, and exfiltration of firewall configurations. This activity shares similarities with a December 2025 campaign that exploited critical Fortinet authentication bypass vulnerabilities (CVE-2025-59718 and C

Key Findings Fortinet has released updates to fix a critical security flaw impacting FortiSIEM that could allow an unauthenticated attacker to achieve code execution on susceptible instances. The vulnerability, tracked as CVE-2025-64155, is rated 9.4 out of 10.0 on the CVSS scoring system. The flaw allows for OS command injection via crafted TCP requests to the phMonitor service running on port 7900. Fortinet has also patched a critical vulnerability in FortiFone (CVE-2025-47

Key Findings Fortinet reported active exploitation of a five-year-old security vulnerability, CVE-2020-12812 (CVSS score: 5.2), in FortiOS SSL VPN. The vulnerability is an improper authentication flaw that may allow users to bypass two-factor authentication (2FA) by changing the case of the username, enabling successful login without being prompted for the second authentication factor. The issue occurs when FortiGate has local 2FA users linked to LDAP, the same users belong t

Key Findings Threat actors have begun exploiting two newly disclosed security flaws in Fortinet FortiGate devices, less than a week after public disclosure. The attacks exploit two critical authentication bypasses (CVE-2025-59718 and CVE-2025-59719, CVSS scores: 9.8). The vulnerabilities allow unauthenticated bypass of SSO login authentication via crafted SAML messages if the FortiCloud SSO feature is enabled. Fortinet has released patches for the flaws in FortiOS, FortiWeb,

Key Findings A critical vulnerability (CVE-2025-59718, CVE-2025-59719) in Fortinet's FortiCloud Single Sign-On (SSO) feature allows unauthenticated attackers to bypass authentication and gain administrative access to affected devices. The vulnerability, which has a CVSS score of 9.1, stems from improper verification of cryptographic signatures (CWE-347) in the FortiCloud SSO SAML implementation. Affected products include FortiOS, FortiWeb, FortiProxy, and FortiSwitch Manager.

Key Findings A critical vulnerability in Fortinet's FortiWeb Web Application Firewall (WAF) product allows unauthenticated attackers to gain administrative-level access. The flaw has been observed actively exploited in the wild since October 2025. A public Proof-of-Concept (PoC) exploit exists, raising the likelihood of widespread exploitation. Organizations using vulnerable versions of FortiWeb are advised to take emergency remediation steps. Background On October 6, 2025, c