CVE-2026-45455
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CSIRTS triage
- What
- Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
- Who is affected
- Unauthorized attackers can exploit this vulnerability if they can access the network.
- Urgency
- Remediation is low urgency due to the lower severity of information disclosure.
- 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 risk0.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 46% of all EPSS-scored CVEs.
Advisory coverage (1)
- lowCVE-2026-45455: Microsoft Excel Information Disclosure Vulnerabilitymsrc · 2026-06-09
External references
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