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    CVE-2026-88175

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

    Published:Oct 13, 2026
    Last Modified:Oct 15, 2026
    EPS:Oct 13, 2026
    EPSS Score:0.00835
    CVSS Score:6.5

    Affected Products

    Vendor
    Microsoft
    Product
    365
    Vendor
    Microsoft
    Product
    365 Apps
    Vendor
    Microsoft
    Product
    Microsoft 365
    Vendor
    Microsoft
    Product
    Microsoft 365 Apps For Enterprise
    Vendor
    Microsoft
    Product
    Microsoft Office 365 For Mac
    Vendor
    Microsoft
    Product
    Microsoft Office Ltsc 2021
    Vendor
    Microsoft
    Product
    Microsoft Office Ltsc 2024
    Vendor
    Microsoft
    Product
    Office 2021
    Vendor
    Microsoft
    Product
    Office 2024
    Vendor
    Microsoft
    Product
    Office 365

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-85875 (CVSS 5.5) — Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.…
    CVE-2026-81950 (CVSS 7.8) — Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81959 (CVSS 7.8) — Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81388 (CVSS 7.8) — Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81395 (CVSS 5.5) — Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.…
    CVE-2026-81394 (CVSS 5.5) — Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows an…
    CVE-2026-81401 (CVSS 5.5) — Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized…
    CVE-2026-81954 (CVSS 7.8) — Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-80085 (CVSS 8.8) — Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a net…
    CVE-2026-80087 (CVSS 6.5) — Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to disclose information over a …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High