A 0-Day is a software vulnerability without an available fix, creating risk because defenders have limited time to mitigate exploitation.
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Background for this topic.
0-Day describes a software vulnerability unknown to the software maker or unpatched when first exploited. Attackers can use these flaws immediately, as no official fix or signature exists to block the exploit. Such vulnerabilities often affect widely deployed software or hardware, making them valuable for targeted attacks or widespread campaigns.
Because defenders lack patches or reliable detection signatures initially, they must rely on anomaly detection, network monitoring, and threat intelligence to identify suspicious activity linked to 0-day exploits. Rapid patching once a fix is released is critical to reduce exposure. Tracking emerging 0-day threats helps prioritize defensive measures and informs risk management decisions in environments where unpatched vulnerabilities pose significant security risks.
SonicWall SSL VPN devices have become the target of Akira ransomware attacks as part of a newfound surge in activity observed in late July 2025
Spy vs. spy China has accused US intelligence agencies of exploiting a Microsoft Exchange zero-day exploit to steal defense-related data and take over more than 50 devices belonging to a "major Chinese military enterprise" for nearly a year.…
Apple has released security updates to address a high-severity vulnerability that has been exploited in zero-day attacks targeting Google Chrome users. [...]
Apple on Tuesday released security updates for its entire software portfolio, including a fix for a vulnerability that Google said was exploited as a zero-day in the Chrome web browser earlier this month
A total of 396 compromised Microsoft SharePoint systems have been identified globally, affecting 145 organizations across 41 countries in the wake of the ToolShell zero-day vulnerability
145 Organizations Compromised by China-Linked Ransomware Hackers and OthersNearly 150 different organizations' on-premises SharePoint servers have been exploited by attackers targeting the zero-day vulnerabilities now tracked as ToolShell, researchers warn. Early attacks have been attributed to China-linked groups, in some cases leading to Warlock ransomware infections.
The connected sex toy platform Lovense is vulnerable to a zero-day flaw that allows an attacker to get access to a member's email address simply by knowing their username, putting them at risk of doxxing and harassment. [...]