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    CVE-2021-31174

    Microsoft Excel Information Disclosure Vulnerability

    Published:May 11, 2021
    Last Modified:Nov 21, 2024
    EPS:May 11, 2021
    EPSS Score:0.00503
    CVSS Score:5.5

    Affected Products

    Vendor
    Microsoft
    Product
    365 Apps
    Vendor
    Microsoft
    Product
    Excel
    Vendor
    Microsoft
    Product
    Office
    Vendor
    Microsoft
    Product
    Office Online Server
    Vendor
    Microsoft
    Product
    Office Web Apps Server

    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-2026-62804 (CVSS 7.8) — External control of file name or path in Microsoft Office Word allows an unauthorized attacker to execute code…
    CVE-2026-85875 (CVSS 5.5) — Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.…
    CVE-2026-83949 (CVSS 5.5) — Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.…
    CVE-2026-83951 (CVSS 5.5) — Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.…
    CVE-2026-81948 (CVSS 7.8) — Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81950 (CVSS 7.8) — Double free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.…
    CVE-2026-81949 (CVSS 7.8) — Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code local…
    CVE-2026-81953 (CVSS 7.8) — Stack-based buffer overflow 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-2026-81952 (CVSS 8.8) — Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a net…

    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