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Critical Vulnerability in Microsoft Outlook Likely to be Exploited in Zero-Day
Mandiant reported a Critical vulnerability in Microsoft Outlook. This vulnerability requires no user interaction and for which proof of concept exploits are now widely available. There is a possibility of privilege escalation with no user interaction or privileges required for exploitation. Following exploitation an attacker could authenticate to multiple services and move laterally. Exploitation of the zero-day is trivial, and it will likely be leveraged imminently by actors for espionage purposes or financial gain.
For a complete description of the vulnerabilities and affected systems go to CVE-2023-23397 Detail.