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    CVE-2023-40721

    A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.

    Published:Feb 11, 2025
    Last Modified:Jan 14, 2026
    EPS:Feb 11, 2025
    EPSS Score:0.00035
    CVSS Score:6.3

    Affected Products

    Vendor
    Fortinet
    Product
    Fortios
    Vendor
    Fortinet
    Product
    Fortipam
    Vendor
    Fortinet
    Product
    Fortiproxy
    Vendor
    Fortinet
    Product
    Fortiswitchmanager

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-135 Format String Injection
    CAPEC-67 String Format Overflow in syslog()

    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