Cisco has published a security advisory, highlighting vulnerabilities in Cisco Jabber on 25th March, 2021. It is recommended that you take the necessary precautions by ensuring your products are always updated.
For more information on this Cisco Jabber update you can follow this URL:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-jabber-PWrTATTC
The Guyana National CIRT recommends that users and administrators review this update and apply it where necessary.
PDF Download: Cisco Releases Security Updates for Jabber.pdf
References
https://cyber.gc.ca/en/alerts/cisco-security-advisory-77
https://thehackernews.com/2021/03/critical-cisco-jabber-bug-could-let.html