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    CVE-2021-26092

    Failure to sanitize input in the SSL VPN web portal of FortiOS 5.2.10 through 5.2.15, 5.4.0 through 5.4.13, 5.6.0 through 5.6.14, 6.0.0 through 6.0.12, 6.2.0 through 6.2.7, 6.4.0 through 6.4.4; and FortiProxy 1.2.0 through 1.2.9, 2.0.0 through 2.0.1 may allow a remote unauthenticated attacker to perform a reflected Cross-site Scripting (XSS) attack by sending a request to the error page with malicious GET parameters.

    Published:Feb 24, 2022
    Last Modified:Nov 21, 2024
    EPS:Feb 24, 2022
    EPSS Score:0.00529
    CVSS Score:4.7

    Affected Products

    Vendor
    Fortinet
    Product
    Fortios
    Vendor
    Fortinet
    Product
    Fortiproxy

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-70466 (CVSS 5.3) — A incomplete list of disallowed inputs vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.2, FortiWeb 7.6.0 …
    CVE-2026-71407 (CVSS 5.6) — A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 ma…
    CVE-2026-71408 (CVSS 5.3) — A allocation of resources without limits or throttling vulnerability in Fortinet FortiOS 7.6.0 through 7.6.6, …
    CVE-2026-59840 (CVSS 4.3) — A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS…
    CVE-2025-43892 (CVSS 4.3) — A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS…
    CVE-2026-23573 (CVSS 6.1) — An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79]…
    CVE-2026-59839 (CVSS 5.5) — A improper limitation of a pathname to a restricted directory ('path traversal') vulnerability in Fortinet For…
    CVE-2025-62826 (CVSS 3.1) — An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-11…

    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