CVE-2023-23399
Published: 14 March 2023
Summary
CVE-2023-23399 is a high-severity Out-of-bounds Read (CWE-125) vulnerability in Microsoft Office. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 8.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Microsoft Excel contains a remote code execution vulnerability tracked as CVE-2023-23399. The flaw is rated 7.8 under CVSS 3.1 with an attack vector that is local, requires low complexity and no privileges, but does need user interaction; successful exploitation can result in full compromise of confidentiality, integrity, and availability. The issue is also associated with CWE-125.
An attacker can exploit the vulnerability by supplying a specially crafted Excel file that the victim must open locally. Because no authentication is required beyond that interaction, an adversary who convinces a target to open the document can execute arbitrary code with the privileges of the current user.
Microsoft has published official guidance and patches for the vulnerability through its Security Response Center update guide at the referenced URL. The EPSS score has remained flat at 0.0735 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-27499
Vulnerability details
Microsoft Excel Remote Code Execution Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.