CVE-2026-97778
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-190
Impact
Remote attackers can execute arbitrary code in the context of the current user. To trigger it, an attacker must convince a user to open a crafted Excel file.
Root cause
An integer overflow or wraparound flaw during file processing allows malicious input to corrupt memory and execute code.
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 Microsoft Office security updates referenced in the MSRC advisory; as an interim measure, block untrusted Excel attachments at the email gateway and avoid opening untrusted spreadsheets.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97778PatchVendor Advisory