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    CVE-2026-55007

    Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

    Published:Sep 8, 2026
    Last Modified:Sep 9, 2026
    EPS:Sep 8, 2026
    EPSS Score:0.00726
    CVSS Score:8.1

    Affected Products

    Vendor
    Microsoft
    Product
    Exchange Server 2019
    Vendor
    Microsoft
    Product
    Exchange Server Se
    Vendor
    Microsoft
    Product
    Microsoft Exchange Server 2019 Cumulative Update 14
    Vendor
    Microsoft
    Product
    Microsoft Exchange Server 2019 Cumulative Update 15
    Vendor
    Microsoft
    Product
    Microsoft Exchange Server Subscription Edition Rtm

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-415 Double Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-69378 (CVSS 7.5) — Uncontrolled recursion in Microsoft Exchange Server allows an unauthorized attacker to deny service over a net…
    CVE-2026-69375 (CVSS 6.5) — Authorization bypass through user-controlled key in Microsoft Exchange Server allows an authorized attacker to…
    CVE-2026-69361 (CVSS 6.5) — Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoof…
    CVE-2026-69356 (CVSS 9.3) — Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Ser…
    CVE-2026-69355 (CVSS 8.8) — External control of file name or path in Microsoft Exchange Server allows an authorized attacker to execute co…
    CVE-2026-62911 (CVSS 8) — Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate …
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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