Latest zero-days Total: 853, in 2025: Zero-days 39, candidates: 0

Multiple vulnerabilities in Apple iOS 18 and iPadOS 18
CVE-2025-31200

Privilege escalation in Microsoft Windows Common Log File System driver
CVE-2025-29824

Remote unauthenticated code execution in Ivanti Connect Secure
CVE-2025-22457

https://forums.ivanti.com/s/article/April-Security-Advisory-Ivanti-Connect-Secure-Policy-Secure-ZTA-Gateways-CVE-2025-22457

Remote denial of service in Matrix Synapse
CVE-2025-30355

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.