A 0-Day is a software vulnerability without an available fix, creating risk because defenders have limited time to mitigate exploitation.
Search across headline titles and summaries.
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.
Microsoft's May Patch Tuesday roundup also included critical fixes for a number of flaws found in infrastructure present in many enterprise and cloud environments.
Microsoft on Tuesday rolled out fixes for as many as 74 security vulnerabilities, including one for a zero-day bug that's being actively exploited in the wild
Microsoft today released updates to fix at least 74 separate security problems in its Windows operating systems and related software. This month's patch batch includes fixes for seven "critical" flaws, as well as a zero-day vulnerability that affects all supported versions of Windows.
Microsoft's May 2022 Patch Tuesday contains several bugs in ubiquitous software that could affect millions of machines, researchers warn.
Microsoft has addressed an actively exploited Windows LSA spoofing zero-day that unauthenticated attackers can exploit remotely to force domain controllers to authenticate them via the Windows NT LAN Manager (NTLM) security protocol. [...]
Today is Microsoft's May 2022 Patch Tuesday, and with it comes fixes for three zero-day vulnerabilities, with one actively exploited, and a total of 75 flaws. [...]