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    CVE-2026-26134

    Integer overflow or wraparound in Microsoft Office allows an authorized attacker to elevate privileges locally.

    Published:Mar 10, 2026
    Last Modified:May 22, 2026
    EPS:Mar 10, 2026
    EPSS Score:0.00047
    CVSS Score:7.8

    Affected Products

    Vendor
    Microsoft
    Product
    365 Copilot
    Vendor
    Microsoft
    Product
    Office

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

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    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