A newly discovered Linux malware known as Quasar Linux, or QLNX, is actively targeting software developers and DevOps engineers with a level of sophistication rarely seen in Linux-focused threats. Unlike most malware that relies on files stored on disk, QLNX runs almost entirely in memory, making it
Microsoft is testing a new Defender for Endpoint capability that will automatically isolate compromised endpoints to thwart attackers' attempts to move laterally across the network. [...]
The Iranian state-sponsored threat actor known as Nimbus Manticore (aka Screening Serpens and UNC1549) has been attributed to a fresh campaign using lures impersonating organizations in the aviation and software sectors across the U.S., Europe, and the Middle East following the joint U.S.-Israeli mi
Microsoft has confirmed a new known issue affecting Windows Server 2016 systems that causes domain controller lookups to fail after installing the KB5087537 May 2026 security update. [...]
Many findings have been confirmed to be critical or high-severity vulnerabilities and the number will continue to increase. The post Anthropic: Mythos Detected 23,000 Potential Vulnerabilities Across 1,000 OSS Projects appeared first on SecurityWeek.
Monday recap. Same mess, new week. A sketchy dev tool got people pwned, old bugs came back from the dead, and security products somehow needed protecting from themselves. A bunch of companies spent the week checking old boxes and forgotten servers they should've patched years ago. Good times. Phishi
Threat actors are exploiting a recently disclosed critical security flaw in Ghost CMS to inject malicious JavaScript code with an aim to fuel ClickFix attacks. According to QiAnXin XLab, the activity involves the exploitation of CVE-2026-26980 (CVSS score: 9.4), an SQL injection vulnerability in Gho
Anthropic appears to be preparing for the public rollout of the Mythos model, which was announced in April as a restricted model that poses major security risks to private and public software. [...]
The affected third-party vendor has not been named, but one possible candidate is TriZetto. The post Oncology Institute Discloses Data Breach appeared first on SecurityWeek.
Cybercriminals are openly selling verified bank accounts, fintech wallets, and cryptocurrency exchange accounts through Telegram channels, turning money laundering into a structured, on-demand criminal service. This underground market has grown far beyond informal recruitment and now operates like a
A new supply chain attack campaign is quietly targeting developers through a method most would never think to look for. Hidden inside software packages on GitHub, a malicious script downloads a Linux binary during installation and disguises it using a filename designed to look like a standard system
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A well-known advanced persistent threat group called Cloud Atlas has been caught using a dangerous technique to hijack Windows systems without alerting anyone on the network. The group modifies a core Windows file called termsrv.dll to unlock multiple simultaneous Remote Desktop Protocol (RDP) sessi
Cybersecurity researchers have shed light on a cross-platform malware called RemotePE that has been put to use by the North Korea-linked Lazarus Group in attacks targeting financial and cryptocurrency organizations. RemotePE, per NCC Group subsidiary Fox-IT, is part of a multi-stage attack chain tha
The Wireshark Foundation has released Wireshark 4.6.6, delivering an important round of security and stability updates that address a serious Dissector Crash vulnerability tied to the ROHC protocol parser, along with a separate global-buffer-overflow flaw affecting MACsec traffic analysis. The relea
GitHub has rolled out new controls for npm to improve the security of the software supply chain, giving maintainers the ability to explicitly approve a release prior to the packages becoming publicly available for installation. Called staged publishing, the feature is now generally available on npm.
A supply chain attack targeting the Laravel Lang localization packages has exposed developers to a sophisticated credential-stealing malware campaign after attackers abused GitHub version tags to distribute malicious code through Composer packages. [...]
Microsoft has confirmed active exploitation of two security vulnerabilities in its security ecosystem, identified as CVE-2026-41091 and CVE-2026-45498, both evaluated under the CVSS scoring system. The issues affect Microsoft Defender and have raised concerns due to confirmed in-the-wild exploitatio
The cybersecurity landscape in 2026 is defined by unprecedented sophistication. Threat actors are leveraging generative AI, highly evasive polymorphic code, and zero-day exploits to bypass traditional perimeter defenses. For modern Security Operations Centers (SOCs) and incident response teams, sign
PyrsistenceSniper is an advanced tool for detecting offline persistence, enabling cybersecurity analysts to identify 117 separate persistence mechanisms across Windows, Linux, and macOS platforms. Originally inspired by Autoruns and PersistenceSniper, this Python-based solution developed by Hexastri