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    CVE-2021-22955

    A unauthenticated denial of service vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.

    Published:Dec 7, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 7, 2021
    EPSS Score:0.0067
    CVSS Score:7.5

    Affected Products

    Vendor
    Citrix
    Product
    Application Delivery Controller
    Vendor
    Citrix
    Product
    Application Delivery Controller Firmware
    Vendor
    Citrix
    Product
    Gateway

    Exploits

    No exploit reference

    Related CVEs

    CVE-2023-24487 (CVSS 6.3) — Arbitrary file read in Citrix ADC and Citrix Gateway …
    CVE-2023-24488 (CVSS 6.1) — Cross site scripting vulnerability in Citrix ADC and Citrix Gateway  in allows and attacker to perform cross s…
    CVE-2022-27508 (CVSS 7.5) — Unauthenticated denial of service…
    CVE-2022-27507 (CVSS 6.5) — Authenticated denial of service…
    CVE-2019-18177 (CVSS 6.5) — In certain Citrix products, information disclosure can be achieved by an authenticated VPN user when there is …
    CVE-2022-27518 (CVSS 9.8) — Unauthenticated remote arbitrary code execution…
    CVE-2022-27516 (CVSS 5.3) — User login brute force protection functionality bypass …
    CVE-2022-27510 (CVSS 9.8) — Unauthorized access to Gateway user capabilities …
    CVE-2022-27513 (CVSS 8.3) — Remote desktop takeover via phishing …
    CVE-2022-27509 (CVSS 6.1) — Unauthenticated redirection to a malicious website…

    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