CVE-2026-97770
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-121
Impact
Remote attackers can execute arbitrary code with the privileges of the local user if a target opens a malicious Excel file. Exploitation requires convincing a user to open a crafted document received over the network or email.
Root cause
A stack-based buffer overflow flaw exists in Microsoft Office Excel when parsing crafted spreadsheet files.
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 security update from the Microsoft Security Response Center advisory once identified. As an interim workaround, block inbound Excel files from untrusted external sources and ensure Protected View remains enabled.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Stack-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-2026-97770PatchVendor Advisory