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    CVE-2025-64157

    A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.

    Published:Feb 10, 2026
    Last Modified:May 12, 2026
    EPS:Feb 10, 2026
    EPSS Score:0.00016
    CVSS Score:6.7

    Affected Products

    Vendor
    Fortinet
    Product
    Fortios

    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-2026-71407 (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