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Cybersecurity researchers have discovered 11 old, Microsoft-signed, Unified Extensible Firmware Interface (UEFI) applications that could be abused to bypass Secure Boot on most systems using the modern firmware standard
Hackers are exploiting a recently disclosed critical vulnerability (CVE-2026-48558) in SimpleHelp to deploy Djinn Stealer, a previously undocumented cross-platform information stealer targeting Windows, macOS, and Linux. [...]
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Android and Linux Kernel flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added Windows Shell and ConnectWise ScreenConnect flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: The first flaw added to the catalog, tracked […]
During the second day of Pwn2Own Berlin 2026, competitors collected $385,750 in cash awards after exploiting 15 unique zero-day vulnerabilities in multiple products, including Windows 11, Microsoft Exchange, and Red Hat Enterprise Linux for Workstations. [...]
Dirty Frag is a newly disclosed Linux local privilege escalation vulnerability affecting kernel networking and memory-fragment handling components including esp4, esp6, and rxrpc. The vulnerability enables reliable escalation from an unprivileged user to root and may be leveraged after initial compromise through SSH access, web shells, containers, or low-privileged accounts. Microsoft Defender is actively monitoring limited in-the-wild activity and provides detection coverage for exploitation attempts. The post Active attack: Dirty Frag Linux vulnerability expands post-compromise risk appeared first on Microsoft Security Blog.
Hackers are targeting developers by exploiting the critical vulnerability CVE-2025-11953 in the Metro server for React Native to deliver malicious payloads for Windows and Linux. [...]
Hackers are targeting developers by exploiting the critical vulnerability CVE-2025-11953 in the Metro server for React Native to deliver malicious payloads for Windows and Linux. [...]
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has updated its Known Exploited Vulnerabilities (KEV) catalog to include a security flaw impacting OpenPLC ScadaBR, citing evidence of active exploitation
Threat hunters have disclosed two different malware campaigns that have targeted vulnerabilities and misconfigurations across cloud environments to deliver cryptocurrency miners
Attackers Can Employ a Vulnerable Driver to Target Most Windows and Linux SystemsResearchers are warning Microsoft Windows as well as many Linux distribution users to install updates that revoke permissions for a vulnerable driver that attackers can use to target most systems, allowing them to bypass UEFI Secure Boot and install a bootkit to take full control of a system.
A new security flaw has been addressed in the Apache OFBiz open-source enterprise resource planning (ERP) system that, if successfully exploited, could lead to unauthenticated remote code execution on Linux and Windows
Apache has fixed a critical security vulnerability in its open-source OFBiz (Open For Business) software, which could allow attackers to execute arbitrary code on vulnerable Linux and Windows servers. [...]
Cybersecurity researchers have unpacked the inner workings of a new ransomware variant called Cicada3301 that shares similarities with the now-defunct BlackCat (aka ALPHV) operation
Also: Hacker Sells Data Obtained Through Snowflake AttackThis week, Microsoft deprecated NTLM authentication, a hacker put apparently stolen Snowflake data up for sale, Ticketmaster confirmed its breach, Cisco patched Webex vulnerabilities, pro-Russian hacktivists claimed a DDoS attack in Spain and Kaspersky launched a free virus removal tool for Linux.
On the first day of Pwn2Own Vancouver 2024, contestants demoed Windows 11, Tesla, and Ubuntu Linux zero-day vulnerabilities and exploit chains to win $732,500 and a Tesla Model 3 car. [...]
A financially motivated hacking group named Magnet Goblin uses various 1-day vulnerabilities to breach public-facing servers and deploy custom malware on Windows and Linux systems. [...]
The maintainers of shim have released version 15.8 to address six security flaws, including a critical bug that could pave the way for remote code execution under specific circumstances
A set of memory corruption flaws have been discovered in the ncurses (short for new curses) programming library that could be exploited by threat actors to run malicious code on vulnerable Linux and macOS systems
Microsoft announced the public preview of a new Defender for IoT feature that helps analyze the firmware of embedded Linux devices like routers for security vulnerabilities and common weaknesses. [...]
Cybersecurity researchers have uncovered a new cloud targeting, peer-to-peer (P2P) worm called P2PInfect that targets vulnerable Redis instances for follow-on exploitation