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Tag: Researcher

Microsoft and security researcher’s dueling posts about cybersecurity disclosures get nasty

Microsoft and a prominent cybersecurity researcher have gotten into a very public and rather personal exchange of unpleasantries about what responsible cybersecurity disclosures should mean in 2026.  A cybersecurity researcher going by the name Nightmare Eclipse, who has disclosed several cybersecurity holes before patches were available, posted that he had tried to contact Microsoft officials…

Microsoft Calls the Zero-Day Dumps Irresponsible. The Researcher Says Microsoft Started It.

A researcher dropped 6 Windows zero-days with no warning. Three are now exploited in the wild. Microsoft is angry. The researcher says Microsoft ignored them first. Over the past month, a researcher going by Chaotic Eclipse, also known as Nightmare-Eclipse, publicly released details of six unpatched vulnerabilities in Windows components including Defender and BitLocker. No…

MiniPlasma Windows 0-Day Enables SYSTEM Privilege Escalation on Fully Patched Systems

Chaotic Eclipse, the security researcher behind the recently disclosed Windows flaws, YellowKey and GreenPlasma, has released a proof-of-concept (PoC) for a Windows privilege escalation zero-day flaw that grants attackers SYSTEM privileges on fully patched Windows systems. Codenamed MiniPlasma, the vulnerability impacts “cldflt.sys,” which refers to the Windows Cloud Files Mini Filter Driver,

Windows Zero-Days Expose BitLocker Bypasses And CTFMON Privilege Escalation

An anonymous cybersecurity researcher who disclosed three Microsoft Defender vulnerabilities has returned with two more zero-days involving a BitLocker bypass and a privilege escalation impacting Windows Collaborative Translation Framework (CTFMON). The security defects have been codenamed YellowKey and GreenPlasma, respectively, by the researcher, who goes by the online aliases Chaotic Eclipse

Edge browser leaves passwords exposed in plain text, says researcher

A Norwegian researcher has identified an issue with Microsoft Edge’s Password Manager that could be a serious concern for businesses. Tom Jøran Sønstebyseter Rønning found that passwords are being saved within the browser in plain text, with the effect that any PC, particularly a shared machine, within an organization is a potential risk. In a…

Edge browser leaves passwords exposed in plain text, says researcher

A Norwegian researcher has identified an issue with Microsoft Edge’s Password Manager that could be a serious concern for businesses. Tom Jøran Sønstebyseter Rønning found that passwords are being saved within the browser in plain text, with the effect that any PC, particularly a shared machine, within an organization is a potential risk. In a…

Chinese spy posed as researcher in spear-phishing campaign targeting NASA to steal defense software

A Chinese national posed as a U.S. researcher, tricking NASA staff in a phishing campaign to steal sensitive data tied to defense software and exports. A Chinese national ran a spear-phishing campaign by posing as a U.S. researcher and tricked NASA employees into sharing sensitive information. The NASA Office of Inspector General (OIG) and federal…

Researcher drops two more Microsoft Defender zero-days, all three now exploited in the wild

The security researcher who earlier this month published a proof-of-concept (PoC) exploit for a zero-day privilege escalation vulnerability in Microsoft Defender is back with two more. The first, dubbed “RedSun,” is another privilege escalation flaw in the same platform. The second, “UnDefend,” allows a standard user to block Microsoft Defender from receiving signature updates or…

Agentic AI memory attacks spread across sessions and users, and most organizations aren’t ready

In this Help Net Security interview, Idan Habler, AI Security Researcher at Cisco, breaks down a threat most security teams haven’t named yet: agentic memory as an attack surface. Habler walks through MemoryTrap, a disclosed and remediated method to compromise Claude Code’s memory, showing how a single poisoned memory object can spread across sessions, users,…

Claude helps researcher dig up decade-old Apache ActiveMQ RCE vulnerability (CVE-2026-34197)

In the latest demonstration of how AI assistants can help with bug hunting, Horizon3.ai researcher Naveen Sunkavally used Claude to unearth CVE-2026-34197, a remote code execution vulnerability in Apache ActiveMQ that’s been introduced in the codebase 13 years ago. The vulnerability was patched in late March 2026 and there’s currently no indication that it is…

Experts published unpatched Windows zero-day BlueHammer

A researcher leaked the unpatched Windows zero-day “BlueHammer,” letting attackers gain SYSTEM rights; no patch exists yet. A disgruntled researcher released the BlueHammer Windows zero-day, a privilege escalation flaw that allows attackers to gain SYSTEM or admin rights, Bleeping Computer reports. The researcher privately reported the vulnerability to Microsoft but criticized the way the Microsoft’s Security…

Microsoft adds multi-model AI to Copilot Researcher, raising accuracy stakes

Microsoft is expanding its Microsoft 365 Copilot “Researcher” agent with new multi-model capabilities designed to improve the accuracy and depth of AI-generated research outputs. The update introduces a “Critique” system that assigns separate roles for generation and evaluation, alongside a “Council” feature that compares outputs from multiple models and highlights agreement, divergence, and unique insights.…

Lazarus, AI, and Trust Abuse: Top Enterprise Cybersecurity Risks 2026 

As part of a recent live expert panel, ANY.RUN together with threat researcher and ethical hacker Mauro Eldritch explored biggest security risks companies should be prepared for in 2026.  The discussion covered several relevant cases, from the Lazarus IT Workers operation to the rapid rise of AI-driven phishing attacks, and examined the common thread behind them: trust abuse.  Below are the key takeaways for those seeking a clearer view of…

Who is the Kimwolf Botmaster “Dort”?

In early January 2026, KrebsOnSecurity revealed how a security researcher disclosed a vulnerability that was used to build Kimwolf, the world’s largest and most disruptive botnet. Since then, the person in control of Kimwolf — who goes by the handle “Dort” — has coordinated a barrage of distributed denial-of-service (DDoS), doxing and email flooding attacks…

What happens when cybersecurity knowledge walks out the door

In this Help Net Security interview, Andrew Northern, Principal Security Researcher at Censys, explains why mentorship matters and what organizations risk losing when senior staff disengage. He argues that institutional memory and judgment under pressure are difficult to rebuild once they disappear. Northern also pushes back on the idea that mentoring makes someone replaceable, saying…