Latest cybersecurity reporting from selected sources.

Microsoft confirmed the RoguePlanet Defender zero-day (CVE-2026-50656), a privilege escalation flaw, and is developing a security patch. Microsoft has acknowledged the RoguePlanet zero-day affecting Microsoft Defender, tracked as CVE-2026-50656 (CVSS score of 7.8). The vulnerability allows privilege escalation through the Microsoft Malware Protection Engine. The company stated it is aware of the issue and is […]

Microsoft has formally disclosed that it's working to release a patch to address a Defender zero-day codenamed RoguePlanet

Exploit hasn't been picked up by any malware detection engines, CEO tells The Reg A Microsoft zero-day vulnerability that allows an unprivileged user to crash the Windows Remote Access Connection Manager (RasMan) service now has a free, unofficial patch - with no word as to when Redmond plans to release an official one - along with a working exploit circulating online.…

This week saw a lot of new cyber trouble. Hackers hit Fortinet and Chrome with new 0-day bugs. They also broke into supply chains and SaaS tools. Many hid inside trusted apps, browser alerts, and software updates

Attackers are wielding the sophisticated modular malware while exploiting CVE-2025-29824, a previously zero-day flaw in Windows Common Log File System (CLFS) that allows attackers to gain system-level privileges on compromised systems.

An APT hacking group known as 'Stealth Falcon' exploited a Windows WebDav RCE vulnerability in zero-day attacks since March 2025 against defense and government organizations in Turkey, Qatar, Egypt, and Yemen. [...]

Microsoft Researchers Link Turkish Spy Group to Output Messenger Zero-Day HackA Turkish-linked cyberespionage group known as Marbled Dust exploited a zero-day in the Output Messenger Server Manager application to spy on Kurdish military operations in Iraq. Microsoft reported the hack and called for immediate mitigation to block credential theft and malware delivery.

The Play ransomware gang has exploited a high-severity Windows Common Log File System flaw in zero-day attacks to gain SYSTEM privileges and deploy malware on compromised systems. [...]

Attackers aren’t waiting for patches anymore — they are breaking in before defenses are ready. Trusted security tools are being hijacked to deliver malware. Even after a breach is detected and patched, some attackers stay hidden

The threat actor known as EncryptHub exploited a recently-patched security vulnerability in Microsoft Windows as a zero-day to deliver a wide range of malware families, including backdoors and information stealers such as Rhadamanthys and StealC

A threat actor known as BrazenBamboo has exploited an unresolved security flaw in Fortinet's FortiClient for Windows to extract VPN credentials as part of a modular framework called DEEPDATA

A newly patched security flaw impacting Windows NT LAN Manager (NTLM) was exploited as a zero-day by a suspected Russia-linked actor as part of cyber attacks targeting Ukraine

The "Code-on-Toast" supply chain cyberattacks by APT37 delivered data-stealing malware to users in South Korea who had enabled Toast pop-up ads.

The North Korean threat actor known as ScarCruft has been linked to the zero-day exploitation of a now-patched security flaw in Windows to infect devices with malware known as RokRAT

​CISA has ordered U.S. federal agencies to secure their systems against a recently patched Windows MSHTML spoofing zero-day bug exploited by the Void Banshee APT hacking group. [...]

The South Korea-aligned cyberespionage group APT-C-60 has been leveraging a zero-day code execution vulnerability in the Windows version of WPS Office to install the SpyGlace backdoor on East Asian targets. [...]

Lazarus Espionage Group's Sophisticated Malware Evades Antivirus MonitoringNorth Korea's Lazarus hacking team, which focuses on cryptocurrency theft and espionage, has once again been exploiting a zero-day vulnerability in Microsoft Windows to install antivirus-suppressing malware dubbed Fudmodule to aid its intrusions.

​Microsoft has fixed a zero-day vulnerability exploited in attacks to deliver QakBot and other malware payloads on vulnerable Windows systems. [...]

A new malware campaign leveraged two zero-day flaws in Cisco networking gear to deliver custom malware and facilitate covert data collection on target environments

Microsoft has fixed two actively exploited zero-day vulnerabilities during the April 2024 Patch Tuesday, although the company failed to initially tag them as such. [...]