CVE-2026-97007

8.8High

Published 13 Oct 2026 · NVD status: Analyzed · AI triage by gemini-3.8-flash

8.8High

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required
Impact: Full C/I/A compromise
Weakness: CWE-122

Impact

Remote attackers can execute arbitrary code with the privileges of the local user if they trick someone into opening a crafted Excel document. Exploitation requires no prior privileges or system access.

Root cause

A heap-based buffer overflow flaw exists in Microsoft Office Excel's file parsing logic.

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

Install the latest security update from the Microsoft MSRC advisory; if patching must wait, block or quarantine untrusted inbound Excel attachments at email and web gateways.

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

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

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97007PatchVendor Advisory

Source: nvd.nist.gov/vuln/detail/CVE-2026-97007