CVE-2026-45458
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
CSIRTS triage
- What
- Access of resource using incompatible type ('type confusion') allows an unauthorized attacker to execute code locally.
- Who is affected
- Deployments of Microsoft Outlook.
- Urgency
- Remediation is urgent due to the high severity and potential for remote code execution.
- Action
- Apply the latest security patch for Microsoft Outlook.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Advisory coverage (1)
- highCVE-2026-45458: Microsoft Outlook and Word Remote Code Execution Vulnerabilitymsrc · 2026-06-09
External references
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