CVE-2026-45469
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk30th percentile - higher than 30% of all known CVEs
Summary
Integer underflow (wrap or wraparound) vulnerability in Microsoft Office Excel. An unauthorized attacker can exploit this flaw to execute code locally.
Risk Assessment
An attacker can execute arbitrary code on the victim's machine, leading to full system compromise.
Recommendation
Install the latest Microsoft Office security updates available via Microsoft Update.
Other vulnerabilities in Microsoft Office Excel
See all- 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-2026-108446High
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.
- 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.
- CVE-2026-97778High
Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Original NVD description (English source)
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS