Latest updates for Zero-Day

Fresh curated links around Zero-Day are collected here so marketers can spot useful updates and turn timely ideas into posts faster.

Recent items include:

  • 「ゼロデイ」攻撃は何がゼロなの?
  • Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025
  • Microsoft Defender Zero-Day Vulnerabilities Actively Exploited in the Wild

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ascii.jp /1 month ago

「ゼロデイ」攻撃は何がゼロなの?

ソフトウェアやハードウェアの脆弱性が発見された直後で、修正プログラムが未公開である状態を指す。脆弱性の修正手段が確立されるまでの期間が「0日」であることから「ゼロデイ(Zero-day)」...

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thehackernews.com /1 month ago

Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025

Threat actors have been exploiting a previously unknown zero-day vulnerability in Adobe Reader using maliciously crafted PDF documents since at least December 2025. The finding, de...

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gbhackers.com /1 week ago

Microsoft Defender Zero-Day Vulnerabilities Actively Exploited in the Wild

Microsoft has disclosed two new zero-day vulnerabilities in Microsoft Defender that are actively being exploited in the wild, raising concerns among security professionals and ente...

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hackread.com /1 month ago

Adobe Reader Zero-Day Exploited to Steal Data via Malicious PDFs

An Adobe Reader zero-day vulnerability is being actively exploited via malicious PDFs, allowing hackers to steal data without user interaction, with no patch available.

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thehackernews.com /1 month ago

Three Microsoft Defender Zero-Days Actively Exploited; Two Still Unpatched

Huntress is warning that threat actors are exploiting three recently disclosed security flaws in Microsoft Defender to gain elevated privileges in compromised systems. The activity...

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gbhackers.com /1 month ago

New PoC Exploit Published for Microsoft Defender 0-Day Flaw

A security researcher operating under the alias “Chaotic Eclipse” has publicly released a proof-of-concept (PoC) exploit for a vulnerability in Microsoft Defender. Published on Apr...

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thehackernews.com /1 month ago

Your MTTD Looks Great. Your Post-Alert Gap Doesn't

Anthropic restricted its Mythos Preview model last week after it autonomously found and exploited zero-day vulnerabilities in every major operating system and browser. Palo Alto Ne...

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go.theregister.com /1 month ago

Anthropic: All your zero-days are belong to Mythos

Hasn't released it to the public, because it would break the internet - in a bad way For years, the infosec community’s biggest existential worry has been quantum computers blowing...

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gbhackers.com /1 month ago

Hackers Target Adobe Reader Users With Sophisticated Zero-Day Exploit

Security researchers at EXPMON have uncovered a highly sophisticated, unpatched zero-day vulnerability actively targeting Adobe Reader users. The exploit, first detected in the wil...

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ubergizmo.com /1 month ago

Adobe Reader Zero-Day Exploit Uses Fake PDF Files To Steal User Data

A critical security vulnerability in Adobe Reader is being actively exploited by cybercriminals through a sophisticated and evolving phishing campaign. The attack relies on social...

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pcworld.com /1 month ago

Security expert publishes Windows exploit after Microsoft went silent

One security researcher discovered a previously unpatched vulnerability in Windows and reported it to the Microsoft Security Response Center. However, they didn’t respond to his re...

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pcworld.com /1 week ago

Unpatched Windows zero-day from 2020 gives hackers full system access

A security researcher by the name of Nightmare-Eclipse (also known as Chaotic Eclipse) has warned of a critical security vulnerability in Windows 11 that could be exploited by hack...

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infosecurity-magazine.com /2 days ago

Microsoft Condemns "Uncoordinated" Zero Day Disclosures

Microsoft warned the disclosure of several unpatched vulnerabilities without notice has put “customers at unnecessary risk”

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thehackernews.com /2 weeks ago

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 escal...

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theregister.com /2 days ago

Disgruntled 0-day hunter 'humiliated' by Microsoft pledges 'bone shattering drop' as Redmond calls cops

Six 0-days, three under active exploitation, more to come on July 14?

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smartermsp.com /2 weeks ago

Cybersecurity Threat Advisory: PAN-OS Captive Portal zero-day vulnerability

Threat actors are actively exploiting a PAN‑OS zero‑day that impacts the User‑ID Authentication (Captive) Portal. This exploit enables unauthenticated remote code execution with ro...

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smartermsp.com /1 month ago

Cybersecurity Threat Advisory: Adobe Acrobat Reader zero-day

Reports confirm active exploitation of a previously unknown zero‑day vulnerability in Adobe Acrobat Reader since at least December 2025. Attackers are delivering malicious PDF file...

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go.theregister.com /1 month ago

Months-old Adobe Reader zero-day uses PDFs to size up targets

Malicious PDFs abuse legit features to harvest system data and decide which victims get a 2nd-stage payload Hackers have been quietly exploiting what appears to be a zero-day in Ad...

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pcworld.com /1 month ago

Acrobat Reader has an unpatched zero-day. Stop opening unknown PDFs

According to BleepingComputer, there’s a serious vulnerability in Acrobat Reader that can be exploited to steal sensitive data. Security researcher Haifei Li says that hackers h...

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smartermsp.com /3 weeks ago

Cybersecurity Threat Advisory: Blue Hammer zero-day

A researcher leaked a zero‑day vulnerability dubbed “BlueHammer” to protest Microsoft’s handling of the private disclosure process. Although the published code contains implementat...

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theregister.com /3 weeks ago

State-backed hackers hammer Palo Alto firewall zero-day before patch lands

Internet-facing PAN-OS firewalls are once again doing impressions of initial access brokers

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3dnews.ru /1 month ago

Исследователь слил в сеть код эксплойта для Windows в ответ на бездействие Microsoft

Исследователь безопасности выложил в сеть код эксплойта нулевого дня для Windows, получившего название BlueHammer. Причиной такого радикального шага стал конфликт специалиста с Цен...

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thehackernews.com /1 week ago

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 escal...

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techmeme.com /1 month ago

Researchers: attackers have been exploiting a zero-day vulnerability in Adobe Reader since at least December 2025, and s...

Sergiu Gatlan / BleepingComputer: Researchers: attackers have been exploiting a zero-day vulnerability in Adobe Reader since at least December 2025, and some docs contain Russian-l...

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Sources covering Zero-Day

smartermsp.com

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3dnews.ru

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ascii.jp

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feeds.feedburner.com

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feeds.feedburner.com

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gbhackers.com

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