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.
Hackers have already compromised thousands of Palo Alto Networks firewalls in attacks exploiting two recently patched zero-day vulnerability vulnerabilities. [...]
An elusive, sophisticated cybercriminal group has used known and zero-day vulnerabilities to compromise more than 20,000 SOHO routers and other IoT devices so far, and then puts them up for sale on a residential proxy marketplace for state-sponsored cyber-espionage actors and others to use.
Apple has released security updates for iOS, iPadOS, macOS, visionOS, and its Safari web browser to address two zero-day flaws that have come under active exploitation in the wild
No word on when or if the issue will be fixed Chinese government-linked snoops are exploiting a zero-day bug in Fortinet's Windows VPN client to steal credentials and other information, according to memory forensics outfit Volexity.…
Apple released emergency security updates to fix two zero-day vulnerabilities that were exploited in attacks on Intel-based Mac systems. [...]
Oracle has fixed an unauthenticated file disclosure flaw in Oracle Agile Product Lifecycle Management (PLM) tracked as CVE-2024-21287, which was actively exploited as a zero-day to download files. [...]
Amazing that these two bugs got into a production appliance, say researchers Palo Alto Networks (PAN) finally released a CVE identifier and patch for the zero-day exploit that caused such a fuss last week.…
Chinese threat actors use a custom post-exploitation toolkit named 'DeepData' to exploit a zero-day vulnerability in Fortinet's FortiClient Windows VPN client that steal credentials. [...]
Palo Alto Networks has finally released security updates for an actively exploited zero-day vulnerability in its Next-Generation Firewalls (NGFW). [...]
The security vendor's Expedition firewall appliance's PAN-OS interface tool has racked up four critical security vulnerabilities under active attack in November, leading tit to advise customers to update immediately or and take them off the Internet.