CVE-2026-45459
Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
CSIRTS triage
- What
- Protection mechanism failure in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- Who is affected
- Users of Microsoft Excel.
- Urgency
- Remediation is low priority due to the low severity of the vulnerability.
- Action
- Consider updating Microsoft Excel to the latest version.
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)
- lowCVE-2026-45459: Microsoft Excel Security Feature Bypass Vulnerabilitymsrc · 2026-06-09
External references
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