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Findings

CVE-2026-88190

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Published Oct 13, 2026 · updated Oct 14, 2026 · microsoft 365 apps

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · NIST NVD

    Detected

    Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

  2. Oct 14, 2026 · NIST NVD

    Updated

    Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Affected

  • cpe microsoft/365 appsversion unspecified
  • cpe microsoft/office 2021version unspecified
  • cpe microsoft/office 2024version unspecified

Sources

  • CVE.orgCVE-2026-88190

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2026-88190

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDCVE-2026-88190

    Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

    nvd.nist.gov

References