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Lead Story
Lazarus Exploits Windows Zero-Day to Gain SYSTEM Access and Deploy Backdoor
The North Korean threat actor known as Lazarus Group has been attributed to the zero-day exploitation of a newly patched security flaw impacting Microsoft Windows to deliver a never-before-seen backdoor targeting defense and aerospace companies across France, Germany, Brazil, and India.
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Why it matters: This matters because a Windows zero-day tied to Lazarus is not just another patch headline. It is a reminder that high-value organizations can move from routine Windows exposure into hands-on state-backed intrusion pressure very quickly once an exploit chain is in play.
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Original source: The Hacker News
Also Worth Your Attention
Microsoft patches LegacyHive Windows zero-day vulnerability
Microsoft has released security patches to address a Windows zero-day vulnerability known as "LegacyHive," disclosed after the July 2026 Patch Tuesday.
Why it matters: This matters because a patched Windows zero-day still leaves a hard question behind: how many organizations know which systems were exposed before the fix landed? The risk is not hearing about the patch too late. It is discovering too late that inventory and remediation confidence were overstated.
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Attackers Exploit SharePoint Authentication Bypass After Public PoC Release
Threat actors have begun to exploit a newly disclosed Microsoft SharePoint vulnerability following the release of a proof-of-concept (PoC) code. The vulnerability in question is CVE-2026-55040 (CVSS score: 9.1), which refers to a critical security feature bypass that stems from weak authentication. It was patched by Microsoft as part of its July 2026 Patch Tuesday updates.
Why it matters: This matters because once a public PoC and live exploitation collide on SharePoint, the risk shifts from patch awareness to exposure verification. Teams need to know not only whether they patched, but whether any externally reachable or weakly managed SharePoint footprint was left behind.
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Critical VMware vCenter RCE flaw exploited for reverse SSH access
A recently patched critical vulnerability (CVE-2026-59310) in VMware vCenter Syslog Server is being exploited in an active campaign to deploy a reverse SSH tool for persistence and remote access.
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Why it matters: This matters because vCenter sits in a privileged management lane. If attackers can turn a remotely reachable flaw there into persistence, the problem is not one server. It is the trust position that server holds over virtual infrastructure and the speed with which defenders can prove it is clean.
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DeadLock ransomware: Breaking down a Rust-based encryptor with decentralized recovery infrastructure
Microsoft Threat Intelligence examines DeadLock ransomware, an emerging financially motivated operation distinguished by its use of decentralized infrastructure to support victim communications, negotiations, and data leak operations alongside double extortion tactics used to pressure victims.
Why it matters: The real implication is not just attacker activity. It is how quickly uncertainty around exposure, ownership, and recovery can turn a contained problem into a messy operational one.
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Newer CyberExperts coverage on this topic
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