It has been a busy couple of days at the US Cybersecurity and Infrastructure Security Agency as they issue a range of security advisories:
Drupal Releases Security Update | CISA
Microsoft Releases Guidance on Zero-Day Vulnerabilities in Microsoft Exchange Server | CISA
Cisco Releases Security Updates for Multiple Products | CISA
Mozilla Releases Security Update for Thunderbird | CISA
CISA also release security advisories for industrial systems – if you look after that type of systems you should monitor the CISA pages.