On 19th October 2021, Oracle had published a security advisory, highlighting multiple critical vulnerabilities in multiple of its products. It is recommended that you take the necessary precautions by ensuring your products are always updated.
For more information on these vulnerabilities, you can follow this URL:
https://www.oracle.com/security-alerts/cpuoct2021.html
The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary.
PDF Download: Oracle Critical Patch Update.pdf
References,
Oracle quarterly security updates (19th October 2021). Retrieved from Cybersecurity & Infrastructure Security Agency.
Oracle quarterly security updates (20th October 2021). Retrieved from Centre for Internet Security.