CVE-2026-45469
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CSIRTS triage
- What
- Integer underflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- Who is affected
- Users of Microsoft Office Excel are affected.
- Urgency
- Remediation is urgent due to the high severity and potential for remote code execution.
- Action
- Apply the latest security updates from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.
Advisory coverage (1)
- highCVE-2026-45469: Microsoft Excel Remote Code Execution Vulnerabilitymsrc · 2026-06-09
External references
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