CVE-2026-97763: microsoft 365_apps, microsoft microsoft_365, microsoft office_2021

CVSS 8.8 (high) · published 2026-10-13

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Affected products (NVD): microsoft 365_apps, microsoft microsoft_365, microsoft office_2021, microsoft office_2024, microsoft office_online_server

Fixed in (NVD): 16.0.10417.20228

Weakness: CWE-122

Source: NVD CVE-2026-97763

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97763

Check your software

Connect an AI agent to the Fixlane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.