Latest zero-days Total: 356, in 2017: Zero-days 22, candidates: 7

Multiple vulnerabilities in Drupal
CVE-2017-6922

There are confirmed reports indicating that this vulnerability has been publicly exploited in spam campaigns. The attackers were creating accounts, uploading files with spam links to advertise or influence SEO rankings.

Remote code execution when processing .LNK files in Microsoft Windows
CVE-2017-8464

Remote code execution in Windows Search service
CVE-2017-8543

Multiple vulnerabilities in Microsoft Internet Explorer
CVE-2017-0222

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About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.