Latest zero-days Total: 436, in 2020: Zero-days 2, candidates: 0

Remote code execution in Microsoft Internet Explorer
CVE-2020-0674

Remote code execution in Mozilla Firefox and Firefox ESR
CVE-2019-17026

The vulnerability was reported by Qihoo 360 ATA researchers.

Privilege escalation in Microsoft Windows
CVE-2019-1458

This vulnerability was reported by Anton Ivanov and Alexey Kulaev of Kaspersky Lab. This vulnerability was used in Operation WizardOpium campaign against Korean users.

Remote code execution in Microsoft Internet Explorer
CVE-2019-1429

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.