In March, Microsoft announced CVE-2021-26855, in which attackers are actively exploiting a server-side request forgery (SSRF) vulnerability to steal the full contents of several user mailboxes.
Citrix Web App Firewall (WAF) has released updated signatures to mitigate the CVE-2021-26855 vulnerability. Read this blog to learn more about Citrix Web App Firewall. Citrix enables automated learning and adaptation to your application’s behavior, providing protection beyond basic WAF functionality.