CVE-2023-23397 Microsoft Office Outlook Privilege Escalation
An attacker can exploit this vulnerability in Microsoft Outlook to elevate privileges on the target system.
- Exploited in the wild
- Since 14 Mar 2023
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-23397?
CVE-2023-23397 is a critical vulnerability in Microsoft 365 Apps, published on 14 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Microsoft Outlook Elevation of Privilege Vulnerability
Which versions are affected by CVE-2023-23397?
It affects 4 products.
Products include Microsoft 365 Apps, Microsoft Office, Microsoft Office Long Term Servicing Channel, Microsoft Outlook.
How do I fix CVE-2023-23397?
No fix has been published for CVE-2023-23397 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 4 Apr 2023.
Is CVE-2023-23397 being exploited?
Yes. Attackers have exploited CVE-2023-23397 in the wild since at least 14 Mar 2023.
Public exploit code: 29 proofs of concept on GitHub.
Other vulnerabilities in Microsoft 365 Apps
- CVE-2024-21413 Microsoft Outlook Improper Input Validation
- CVE-2024-38189 Microsoft Project Remote Code Execution Vulnerability
- CVE-2023-35311 Microsoft Outlook Security Feature Bypass
- CVE-2026-21514 Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision
- CVE-2026-21509 Microsoft Office Security Feature Bypass
Sources
Also known as GHSA-4778-q233-jmh5.