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. [...]

Danish intelligence officials blamed Russia for orchestrating cyberattacks against Denmark's critical infrastructure, as part of Moscow's hybrid attacks against Western nations. [...]

WatchGuard has warned customers to patch a critical, actively exploited remote code execution (RCE) vulnerability in its Firebox firewalls. [...]

Grocery delivery service Instacart will refund $60 million to settle FTC claims that it misled customers with false advertising and unlawfully enrolled them in paid subscriptions. [...]

The Clop ransomware gang is targeting Internet-exposed Gladinet CentreStack file servers in a new data theft extortion campaign. [...]

French authorities arrested two crew members of an Italian passenger ferry suspected of infecting the ship with malware that could have enabled them to remotely control the vessel. [...]

Hewlett Packard Enterprise (HPE) has patched a maximum-severity vulnerability in its HPE OneView software that enables attackers to execute arbitrary code remotely. [...]

Microsoft has confirmed that recent Windows updates trigger RemoteApp connection failures on Windows 11 24H2/25H2 and Windows Server 2025 devices in Azure Virtual Desktop environments. [...]

​Cisco warned customers today of an unpatched, maximum-severity Cisco AsyncOS zero-day actively exploited in attacks targeting Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances. [...]

SonicWall warned customers today to patch a vulnerability in the SonicWall SMA1000 Appliance Management Console (AMC) that was chained in zero-day attacks to escalate privileges. [...]

Microsoft has asked businesses to reach out for advice on how to temporarily mitigate a Message Queuing (MSMQ) issue causing enterprise apps and Internet Information Services (IIS) sites to fail. [...]

The Texas Attorney General sued five major television manufacturers, accusing them of illegally collecting their users' data by secretly recording what they watch using Automated Content Recognition (ACR) technology. [...]

Petróleos de Venezuela (PDVSA), Venezuela's state-owned oil company, was hit by a cyberattack over the weekend that disrupted its export operations. [...]

Microsoft announced on Monday that it will soon block mobile devices running outdated email software from accessing Exchange Online services until they're updated. [...]

European law enforcement authorities dismantled a fraud network operating call centers in Ukraine that scammed victims across Europe out of more than 10 million euros. [...]

Microsoft says that recent Windows 11 security updates are causing VPN networking failures for enterprise users running Windows Subsystem for Linux. [...]

Over the weekend, ​Google's threat intelligence team linked five more Chinese hacking groups to attacks exploiting the maximum-severity "React2Shell" remote code execution vulnerability. [...]

The French Interior Minister confirmed on Friday that the country's Ministry of the Interior was breached in a cyberattack that compromised e-mail servers. [...]

Microsoft has confirmed that the December 2025 security updates are breaking Message Queuing (MSMQ) functionality, affecting enterprise applications and Internet Information Services (IIS) websites. [...]