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CVE-2026-62870: Microsoft Excel Remote Code Execution Vulnerability

highCVSS 8.8CVE-2026-62870
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62870

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-62870coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Excel Remote

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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