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.
Cisco advises owners of end-of-life Small Business RV routers to upgrade to newer models after disclosing a remote code execution vulnerability that will not be patched. [...]
A sophisticated Chinese advanced persistent threat (APT) actor exploited a critical security vulnerability in Sophos' firewall product that came to light earlier this year to infiltrate an unnamed South Asian target as part of a highly-targeted attack
Chinese hackers used a zero-day exploit for a critical-severity vulnerability in Sophos Firewall to compromise a company and breach cloud-hosted web servers operated by the victim. [...]
Microsoft on Tuesday released software updates to fix 60 security vulnerabilities in its Windows operating systems and other software, including a zero-day flaw in all supported Microsoft Office versions on all flavors of Windows that's seen active exploitation for at least two months now. On a lighter note, Microsoft is officially retiring its Internet Explorer (IE) web browser, which turns 27 years old this year.
Microsoft officially released fixes to address an actively exploited Windows zero-day vulnerability known as Follina as part of its Patch Tuesday updates
Plus: Intel, AMD react to Hertzbleed data-leaking holes in CPUs Patch Tuesday Microsoft claims to have finally fixed the Follina zero-day flaw in Windows as part of its June Patch Tuesday batch, which included security updates to address 55 vulnerabilities.…
Here are which Microsoft patches to prioritize among the June Patch Tuesday batch.
Microsoft has released security updates with the June 2022 cumulative Windows Updates to address a critical Windows zero-day vulnerability known as Follina and actively exploited in ongoing attacks. [...]
Today is Microsoft's June 2022 Patch Tuesday, and with it comes fixes for 55 vulnerabilities, including fixes for the Windows MSDT 'Follina' zero-day vulnerability and new Intel MMIO flaws. [...]