CVE-2023-33153: 
vulnerability analysis and mitigation

Microsoft Outlook Remote Code Execution Vulnerability (CVE-2023-33153) was disclosed on July 11, 2023. This vulnerability affects various Microsoft products including Microsoft 365 Apps Enterprise editions, Microsoft Office 2013 SP1, Office 2016, and Office 2019 in both x86 and x64 versions (NVD).

The vulnerability has received a CVSS v3.1 base score of 8.8 (HIGH) from NIST with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, while Microsoft assessed it with a score of 6.8 (MEDIUM) and vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H. The vulnerability is classified as CWE-416 (Use After Free) (NVD).

If successfully exploited, this vulnerability could allow an attacker to execute remote code on the affected system, potentially gaining the same level of privileges as the compromised user. The vulnerability affects confidentiality, integrity, and availability of the system as indicated by the CVSS metrics (NVD).

Microsoft has released security updates to address this vulnerability. Users are advised to apply the security update KB4475581 for Office 2016 and corresponding updates for other affected versions. The updates are available through Microsoft Update, Microsoft Update Catalog, and as standalone packages through the Microsoft Download Center (Microsoft Support).