CVE-2026-81948 – Microsoft Excel Remote Code Execution Vulnerability
CVSS 7.8
IMPORTANT
Critical - Same Day Deployment
“A malicious Office file could turn a routine document opening into remote code execution, putting sensitive data and system integrity at risk.”
CVE-2026-81948 is a critical Microsoft Excel remote code execution vulnerability caused by a heap-based buffer overflow. An unauthorized attacker can send a specially crafted Office file and convince a user to open it, potentially allowing attacker-controlled code to execute locally. No privileges are required, but successful exploitation requires user interaction.
Key Details
- Affected Product
- Microsoft 365 Apps
- Attack Vector
- Local
- Attack Complexity
- Low
- Privileges Required
- None
- User Interaction
- Required
- CWE Classification
- CWE-122
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