CVE-2026-108446
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
A use-after-free vulnerability in Microsoft Office Excel allows an unauthenticated attacker to execute code over a network. The vulnerability occurs when processing specially crafted data.
Risk Assessment
An attacker can remotely execute arbitrary code in the context of the Excel process, potentially leading to system compromise. The risk is high due to no authentication requirement.
Recommendation
Update Microsoft Office Excel to the latest patched version. Avoid opening suspicious spreadsheets.
Other vulnerabilities in Microsoft Office Excel
See all- CVE-2026-40360High
An out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
- CVE-2026-40359High
A use after free vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20957High
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20956High
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20955High
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20950High
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20949High
Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- CVE-2026-20946High
An out-of-bounds read vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-97780High
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- CVE-2026-97779Medium
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. The attacker can read data outside the intended memory bounds.
Original NVD description (English source)
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS