Description
Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Affected products
microsoft: 365 apps; microsoft: microsoft 365; microsoft: office 2021; microsoft: office 2024; microsoft: office online server
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97740 PatchVendor Advisory
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 59 · as of 11 November 2026
- CWE
- CWE-497
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.