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.
Spyware Targets Samsung Galaxy Devices, Says Unit 42Hackers used previously unknown commercial spyware dubbed "Landfall" to surveil the activities of Samsung Galaxy device owners in the Middle East, say security researchers who posit the threat actor has connections to the United Arab Emirates.
'Precision espionage campaign' began months before the flaw was fixed A previously unknown Android spyware family called LANDFALL exploited a zero-day in Samsung Galaxy devices for nearly a year, installing surveillance code capable of recording calls, tracking locations, and harvesting photos and logs before Samsung finally patched it in April.…
QNAP has fixed seven zero-day vulnerabilities that security researchers exploited to hack QNAP network-attached storage (NAS) devices during the Pwn2Own Ireland 2025 competition. [...]
A threat actor exploited a zero-day vulnerability in Samsung's Android image processing library to deploy a previously unknown spyware called 'LandFall' using malicious images sent over WhatsApp. [...]
A now-patched security flaw in Samsung Galaxy Android devices was exploited as a zero-day to deliver a "commercial-grade" Android spyware dubbed LANDFALL in targeted attacks in the Middle East
Cisco warned this week that two vulnerabilities, which have been exploited in zero-day attacks, are now being abused to force ASA and FTD firewalls into reboot loops. [...]
A critical security issue in a popular endpoint manager (CVE-2025-61932) allowed Chinese state-sponsored attackers to backdoor Japanese businesses.