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.
Google on Friday released out-of-band updates to resolve an actively exploited zero-day flaw in its Chrome web browser, making it the first such bug to be addressed since the start of the year
Google has released an emergency Chrome security update to address the first zero-day vulnerability exploited in attacks since the start of the year. [...]
Google on Thursday outlined a set of initiatives aimed at improving the vulnerability management ecosystem and establishing greater transparency measures around exploitation
A wide-ranging campaign to inject malicious code into WordPress-run websites has been ongoing for at least five years.
Is Secure Boot without the Secure just "Boot"?
It is one of around 100 software flaws addressed this month
Microsoft today released software updates to plug 100 security holes in its Windows operating systems and other software, including a zero-day vulnerability that is already being used in active attacks. Not to be outdone, Apple has released a set of important updates addressing two zero-day vulnerabilities that are being used to attack iPhones, iPads and Macs.
The April 2023 Patch Tuesday security update also included a reissue of a fix for a 10-year-old bug that a threat actor recently exploited in the supply chain attack on 3CX.
Microsoft has patched a zero-day vulnerability in the Windows Common Log File System (CLFS), actively exploited by cybercriminals to escalate privileges and deploy Nokoyawa ransomware payloads. [...]
Today is Microsoft's April 2023 Patch Tuesday, and security updates fix one actively exploited zero-day vulnerability and a total of 97 flaws. [...]
Keep calm and install patches before abuse becomes widespread Apple rolled out patches on Good Friday to its iOS, iPadOS, and macOS operating systems and the Safari web browser to address vulnerabilities found by Google and Amnesty International that were exploited in the wild.…
That double-whammy Apple browser-to-kernel spyware bug combo we wrote up last week? Turns out it applies to all supported Macs and iDevices - patch now!
Apple has released emergency updates to backport security patches released on Friday, addressing two actively exploited zero-day flaws also affecting older iPhones, iPads, and Macs. [...]