CVE-2026-97771
8.8HighPublished 13 Oct 2026 · NVD status: Analyzed · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Impact
- Full C/I/A compromise
- Weakness
- CWE-416
Impact
Remote attackers can execute arbitrary code with the privileges of the local user if a target opens a malicious Excel file. Exploitation requires no privileges but depends on user interaction.
Root cause
A use-after-free vulnerability exists in Microsoft Office Excel's memory handling.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Fix & remediation
Apply the official security update from the Microsoft Security Response Center advisory once released; until patched, block untrusted Excel attachments at the email gateway and avoid opening unexpected spreadsheets.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97771PatchVendor Advisory