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Background for this topic.
Fortinet is a cybersecurity vendor best known for FortiGate, a network firewall platform running FortiOS. FortiGate appliances, virtual machines, and cloud deployments provide traffic filtering, VPN access, intrusion prevention, and network segmentation; related products manage devices, collect security telemetry, or protect endpoints. FortiGuard Labs supplies threat intelligence and detection updates used across parts of this ecosystem.
Fortinet matters to security teams because its devices commonly sit at network boundaries and may expose administrative interfaces or SSL-VPN services to the internet. Vulnerabilities in FortiOS or supporting products can therefore create a path to authentication bypass, unauthorized access, or interception of remote connections when affected configurations are present. Practitioners should track Fortinet advisories, promptly apply firmware and signature updates, restrict management access, use multifactor authentication where supported, and monitor device logs and configuration changes. During an incident, preserve firewall and VPN telemetry and review connected systems rather than treating the appliance as an isolated asset.
Weekly headline count for the current query.
US government agencies have until July 19 to patch two critical Fortinet vulnerabilities
CISA on Thursday ordered government agencies to prioritize patching two actively exploited vulnerabilities in the Fortinet FortiSandbox threat detection platform. [...]
After gaining a foothold in thousands of Fortinet firewalls, the attackers are starting to monetize that access, and are also piling on a Nextcloud zero-day bug.
A Brazilian banking trojan called Ousaban is going after Windows users who bank in Spain and Portugal. Fortinet's FortiGuard Labs identified the campaign in May 2026
FortiGuard says the Brazilian banking trojan Ousaban is targeting Spain and Portugal via phishing
The NCSC has released guidance for Fortinet customers impacted by the FortiBleed threat campaign
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday urged Fortinet customers with FortiGate appliances to take steps to secure against ongoing malicious activity aimed at thousands of internet-accessible devices
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) urged Fortinet customers to secure their devices after nearly 74,000 firewall and VPN credentials were exposed in a data leak dubbed "FortiBleed." [...]
Ongoing Campaign May Be Grabbing Legacy Passwords From Fortinet FortiGate DevicesCybercriminals are selling access to 75,000 Fortinet FortiGate devices with VPN and web management interfaces, and the admin credentials appear to be legitimate and recently harvested as part of a still-live campaign, security experts warned.
A newly discovered data leak dubbed "FortiBleed" has exposed what appears to be a collection of Fortinet and FortiGate VPN credentials for 73,932 firewall URLs at organizations worldwide. [...]
CloudSEK maps Operation Escaneo, a campaign hitting Latin American infrastructure via perimeter bugs
FortiBleed: Admin Passwords for 75,000 Fortinet Firewalls Are Out in the Wild. Half the Internet-Facing Fortinets on the Planet. Security researcher Bob Diachenko found a server sitting open on the internet containing what appeared to be valid Fortinet VPN credentials, including usernames, email addresses, and plaintext passwords for tens of thousands of organizations. He posted […]
Why are you even reading this?! Rotate your passwords!!
Multiple firms have observed active exploitation of the FortiSandbox defects, and warn that the attacks originate from multiple sources, not a single campaign. The post Attackers hit pair of critical Fortinet vulnerabilities the vendor disclosed in April appeared first on CyberScoop.
Attackers are actively targeting various sectors across nearly 200 countries and already have compiled a list of working credentials for tens of thousands of compromised devices.
All have patches, so make sure you upgrade to a fixed version
Three FortiSandbox flaws, including one patched last week, are being actively exploited, highlighting the shrinking window for defenders. Cybersecurity firm Defused Cyber confirmed it’s seen active exploitation of three vulnerabilities in Fortinet FortiSandbox within a 24-hour window. Two of them had patches sitting available since April. The third got fixed last week, which, apparently, wasn’t […]
Bad actors are exploiting multiple security vulnerabilities in Fortinet FortiSandbox, according to threat intelligence firm Defused Cyber
Attackers are now exploiting several critical vulnerabilities in Fortinet's FortiSandbox cyber threat detection platform, according to threat intelligence company Defused. [...]
Fortinet patched a critical FortiSandbox vulnerability that could let unauthenticated attackers remotely execute commands via crafted HTTP requests. Fortinet released security updates to address several vulnerabilities affecting FortiSandbox, FortiOS, FortiProxy, and FortiPortal. The most severe issue, tracked as CVE-2026-25089 (CVSS score of 9.8), is an OS command injection flaw in FortiSandbox products. The vulnerability could […]