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    CVE-2021-34763

    Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an attacker to execute a cross-site scripting (XSS) attack or an open redirect attack. For more information about these vulnerabilities, see the Details section of this advisory.

    Published:Oct 27, 2021
    Last Modified:Aug 11, 2026
    EPS:Oct 27, 2021
    EPSS Score:0.00461
    CVSS Score:4.8

    Affected Products

    Vendor
    Cisco
    Product
    Firepower Management Center Virtual Appliance
    Vendor
    Cisco
    Product
    Secure Firewall Threat Defense
    Vendor
    Cisco
    Product
    Sourcefire Defense Center

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2021-34781 (CVSS 8.6) — A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat …
    CVE-2021-34764 (CVSS 4.8) — Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) Soft…
    CVE-2021-34762 (CVSS 8.1) — A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software coul…
    CVE-2021-34761 (CVSS 4.4) — A vulnerability in Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker …
    CVE-2021-34756 (CVSS 6.7) — Multiple vulnerabilities in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authentica…
    CVE-2021-34755 (CVSS 6.7) — Multiple vulnerabilities in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authentica…
    CVE-2019-15270 (CVSS 5.4) — A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) could allow a…
    CVE-2019-15269 (CVSS 4.8) — Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) coul…
    CVE-2019-15268 (CVSS 4.8) — Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) coul…

    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