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.
Weekly headline count for the current query.
An insufficient validation input flaw, one of 11 patched in an update this week, could allow for arbitrary code execution and is under active attack.
August Patch Tuesday tackles 121 CVEs, 17 critical bugs and one zero-day bug exploited in the wild.
Malware loads itself from remote servers and bypasses Microsoft's Defender AV scanner, according to reports.
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.
Nate Warfield, CTO at Prevailion, discusses the dangers of focusing on zero-day security vulnerabilities, and how security teams are being distracted from the day-to-day work that prevents most breaches.
Last year, Google Project Zero tracked a record 58 exploited-in-the-wild zero-day security holes.
For April Patch Tuesday, the computing giant addressed a zero-day under active attack and several critical security vulnerabilities, including three that allow self-propagating exploits.
The internet giant issued an update for the bug, which is found in the open-source V8 JavaScript engine.
Two separate campaigns from different threat actors targeted users with the same exploit kit for more than a month before the company fixed an RCE flaw found in February.
The China-affiliated state-sponsored threat actor used Log4j and zero-day bugs in the USAHerds animal-tracking software to hack into multiple government networks.
The computing giant patched 71 security vulnerabilities in an uncharacteristically light scheduled update, including its first Xbox bug.
Both vulnerabilities are use-after-free issues in Mozilla's popular web browser.
The year's 1st Chrome zero-day can lead to all sorts of misery, ranging from data corruption to the execution of arbitrary code on vulnerable systems.
The vendor issued an emergency fix on Sunday, and eCommerce websites should update ASAP to avoid Magecart card-skimming attacks and other problems.
This batch had zero critical CVEs, which is unheard of. Most (50) of the patches are labeled Important, so don't delay to apply the patches, security experts said.