CVE-2026-81399
Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 5.5
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
- EPSS probability
- 0.39%
- CWE
- CWE-126
- Published
- 2026-09-08
- Last modified
- 2026-09-10
Affected products
- Microsoft Microsoft 365 Apps for Enterprise
- Microsoft Microsoft Excel 2016
- Microsoft Microsoft Office 2016
- Microsoft Microsoft Office 2019
- Microsoft Microsoft Office 365 for Mac
- Microsoft Microsoft Office LTSC 2021
- Microsoft Microsoft Office LTSC 2024
- Microsoft Microsoft Office LTSC for Mac 2021
Weakness type
Related vulnerabilities
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- CVE-2026-78516 — Windows Storage Information Disclosure Vulnerability
- CVE-2026-72974 — Microsoft Office Excel Information Disclosure Vulnerability
- CVE-2026-69626 — Microsoft Office Information Disclosure Vulnerability
- CVE-2026-72932 — Windows Message Queuing Queue Manager Information Disclosure Vulnerability
- CVE-2026-69794 — Windows Encrypting File System (EFS) Information Disclosure Vulnerability