// #fortinet
10 articles
Fortinet FortiSandbox CVE-2026-25089 (CVSS 9.8): Unauthenticated Command Injection in Web Management UI
Fortinet has patched a critical command injection vulnerability in FortiSandbox that allows an unauthenticated remote attacker to execute arbitrary system commands through the web management interface. CVE-2026-25089, rated CVSS 9.8, requires no credentials to exploit and affects FortiSandbox versions through 5.4.5 — a particularly sensitive target given the appliance's privileged role in malware analysis.
VPN Gateway Security: Hardening the Network Perimeter Device That Attackers Target First
VPN gateways and remote access concentrators have become the most frequently exploited initial access vector in enterprise network intrusions. With critical vulnerabilities regularly disclosed in Palo Alto GlobalProtect, Citrix NetScaler, Fortinet FortiGate, and now Check Point Security Gateway, this guide covers the security hardening and monitoring posture that reduces exposure regardless of which vendor's appliance your organisation runs.
Citrix NetScaler CVE-2026-3055 Exploitation Escalates — Fortinet Confirms Large-Scale Attacks on Internet-Facing ADC
Fortinet's threat intelligence team has confirmed large-scale active exploitation of CVE-2026-3055, the Citrix NetScaler SAML IDP memory overread vulnerability (CVSSv4 9.3) patched in March. More than 65 days after the patch was available, thousands of internet-facing NetScaler ADC appliances remain unpatched and are being targeted by automated exploitation frameworks.
Fortinet Patches Critical Vulnerabilities in FortiAuthenticator and FortiSandbox — Enterprise SSO and Security Infrastructure at Risk
Fortinet released patches for critical vulnerabilities in FortiAuthenticator and FortiSandbox as part of the May 2026 patch cycle. FortiAuthenticator flaws can enable authentication bypass and session manipulation in enterprise SSO deployments, while FortiSandbox issues affect the analysis platform. Apply patches immediately given Fortinet's established exploitation history.
Fortinet 2026 Global Threat Landscape: Ransomware Victims Up 389% Year-over-Year, AI Crime Industrialising
Fortinet's 2026 Global Threat Landscape Report documents 7,831 confirmed ransomware victims in 2025 — a 389% increase over 2024's approximately 1,600 — alongside the first systematic evidence of AI-enabled cybercrime tooling (WormGPT, FraudGPT, BruteForceAI) being used at scale. Manufacturing, business services, and retail are the hardest-hit sectors. The report reframes the threat environment as fundamentally changed, not merely intensified.
Public Exploit Released for Critical FortiSandbox RCE (CVE-2026-39808, CVSS 9.1) — Unauthenticated Root Access
A public proof-of-concept exploit has been released for CVE-2026-39808, a critical OS command injection vulnerability in Fortinet FortiSandbox that allows unauthenticated attackers to execute arbitrary commands as root via a single HTTP request. A companion authentication bypass flaw (CVE-2026-39813) affects the same versions. Patch to FortiSandbox 4.4.9 or 5.0.6 immediately.
Fortinet FortiClient EMS Zero-Day CVE-2026-35616 Actively Exploited — Emergency Hotfix Available
A pre-authentication remote code execution zero-day in Fortinet FortiClient Enterprise Management Server (CVE-2026-35616, CVSS 9.1) has been under active exploitation since 31 March 2026, ahead of Fortinet's advisory. CISA added it to the KEV catalogue on 6 April with a federal deadline of 9 April. An emergency hotfix is available without requiring system downtime.
CISA Adds Seven CVEs to KEV Including Decade-Old Microsoft Bugs Exploited by Storm-1175
CISA has added seven vulnerabilities to the Known Exploited Vulnerabilities catalogue, including four Microsoft flaws spanning from 2012 to 2025 being actively leveraged by the Storm-1175 ransomware group. The additions highlight a persistent patching blind spot: vulnerabilities patched years ago that never made it into legacy system maintenance cycles, now routinely weaponised for initial access and privilege escalation.
Second Critical FortiClient EMS Flaw in a Month: CVE-2026-21643 Pre-Auth SQL Injection Exposed
Bishop Fox has published full technical details of CVE-2026-21643, a CVSS 9.8 pre-authentication SQL injection in Fortinet FortiClient EMS 7.4.4 that enables unauthenticated remote code execution. The flaw is distinct from last week's CVE-2026-35616 and affects a different version — organisations that patched for CVE-2026-35616 by upgrading to 7.4.5 or 7.4.6 may now be running a version vulnerable to the newer access control flaw.
Fortinet FortiClient EMS Zero-Day CVE-2026-35616 Actively Exploited — Apply Emergency Hotfix Now
A critical pre-authentication API bypass in Fortinet FortiClient EMS (CVSS 9.1) is being actively exploited in the wild, with CISA adding the vulnerability to its Known Exploited Vulnerabilities catalogue on 6 April. Organisations running FortiClient EMS 7.4.5 or 7.4.6 must apply the emergency hotfix immediately — FCEB agencies faced a remediation deadline of 9 April.