CVE-2026-97768
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-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. The attacker needs no prior authentication, only network delivery of the file and user interaction.
Root cause
A heap-based buffer overflow occurs while parsing malformed data in Microsoft Office Excel.
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
Check the MSRC vendor advisory for the security update patch and deploy it to affected Microsoft Office installations. If you cannot patch immediately, block untrusted Excel attachments at the email gateway and avoid opening external spreadsheets.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
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-2026-97768PatchVendor Advisory