Pierluigi Paganini
April 18, 2026
Attackers exploit three Microsoft Defender zero-days, code-named BlueHammer, RedSun, and UnDefend, to gain elevated access. Attackers are exploiting three recently disclosed zero-day flaws in Microsoft Defender to gain higher privileges on compromised systems. The vulnerabilities, called BlueHammer, RedSun, and UnDefend, were revealed by a researcher known as Chaotic Eclipse after criticizing Microsoft’s handling of the […]
Pierluigi Paganini
April 15, 2026
Microsoft Patch Tuesday security updates for April 2026 fixed 165 vulnerabilities, including an actively exploited SharePoint zero-day. Microsoft Patch Tuesday security updates addressed 165 vulnerabilities, making it one of the largest updates by CVE count. One of the most interesting flaws fixed by the IT giant is a critical SharePoint zero-day, tracked as CVE-2026-32201, already […]
Pierluigi Paganini
April 09, 2026
Hackers used an Adobe Reader zero-day for months. Researcher Haifei Li found a malicious PDF and asks the community to help analyze it. Hackers used an Adobe Reader zero-day for months to deliver a sophisticated PDF exploit. Cybersecurity researcher Haifei Li, founder of Expmon, discovered the malicious file and warned the community. On March 26, […]
Pierluigi Paganini
April 07, 2026
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 […]
Pierluigi Paganini
March 13, 2026
Google addressed two high-severity vulnerabilities in the Chrome browser that have been exploited in attacks in the wild. Google has released security updates to address two high-severity vulnerabilities, tracked as CVE-2026-3909 and CVE-2026-3910, in the Chrome browser. The company is aware of attacks in the wild exploiting both flaws. “Google is aware that exploits for […]
Pierluigi Paganini
March 06, 2026
Google’s GTIG reports 90 zero-day vulnerabilities exploited in the wild in 2025, up from 78 in 2024, with a growing share targeting enterprise systems. Google’s Threat Intelligence Group (GTIG) identified 90 zero-day vulnerabilities exploited in the wild in 2025. While slightly below the 100 observed in 2023, the number increased from 78 in 2024, with […]
Pierluigi Paganini
March 02, 2026
Russia-linked APT28 reportedly exploited MSHTML zero-day CVE-2026-21513 before Microsoft patched it, a high-severity bypass flaw. Akamai reports that Russia-linked APT28 may have exploited CVE-2026-21513 CVSS score of 8.8), a high-severity MSHTML vulnerability (CVSS 8.8), before Microsoft patched it in February 2026. The vulnerability is an Internet Explorer security control bypass that can lead to code […]
Pierluigi Paganini
February 25, 2026
A former employee at U.S. defense contractor L3Harris got over 7 years in prison for selling eight zero-days to a Russian broker. Peter Williams, a 39-year-old Australian former L3Harris employee, received a prison sentence of just over seven years for selling eight zero-day exploits to the Russian broker Operation Zero for millions. Williams pleaded guilty […]
Pierluigi Paganini
February 12, 2026
Apple fixed an exploited zero-day in iOS, macOS, and other devices that allowed attackers to run code via a memory flaw. Apple released updates for iOS, iPadOS, macOS, watchOS, tvOS, and visionOS to address an actively exploited zero-day tracked as CVE-2026-20700. The flaw is a memory corruption issue in Apple’s Dynamic Link Editor (dyld) that […]
Pierluigi Paganini
January 26, 2026
Microsoft issued emergency updates to fix an actively exploited Office zero-day, CVE-2026-21509, affecting Office 2016–2024 and Microsoft 365 Apps. Microsoft released out-of-band security updates to address an actively exploited Office zero-day vulnerability tracked as CVE-2026-21509. The issue is a security feature bypass vulnerability that affects multiple Office versions, including Microsoft Office 2016, Microsoft Office 2019, […]
