Latest zero-days Total: 428, in 2019: Zero-days 21, candidates: 0

Privilege escalation in Microsoft Windows Win32k component
CVE-2019-1132

Win32/Exploit.CVE-2019-1132.A
VBA/TrojanDropper.Agent.ABM
VBA/TrojanDropper.Agent.AGK
Win32/Spy.Buhtrap.W
Win32/Spy.Buhtrap.AK
Win32/RiskWare.Meterpreter.G

The vulnerability was discovered by ESET in June 2019 when investigating a highly targeted attack in Eastern Europe.The vulnerability was used in a targeted attack against governmental institutions in Russia by an adversary known as Buhtrap.

Known IoCs:
sha1: CBC93A9DD769DEE98FFE1F43A4F5CADAF568E321

Privilege escalation in Microsoft splwow64
CVE-2019-0880

Security restrictions bypass in Mozilla Firefox and Firefox ESR
CVE-2019-11708

This vulnerability was used along with CVE-2019-11707 in a targeted attack against Conbase.

Remote code execution in Oracle WebLogic Server
CVE-2019-2729

Oracle has released a security alert, notifying users on in the wild exploitation of the vulnerability.

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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.