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    CVE-2016-1909

    Fortinet FortiAnalyzer before 5.0.12 and 5.2.x before 5.2.5; FortiSwitch 3.3.x before 3.3.3; FortiCache 3.0.x before 3.0.8; and FortiOS 4.1.x before 4.1.11, 4.2.x before 4.2.16, 4.3.x before 4.3.17 and 5.0.x before 5.0.8 have a hardcoded passphrase for the Fortimanager_Access account, which allows remote attackers to obtain administrative access via an SSH session.

    Published:Jan 15, 2016
    Last Modified:Apr 12, 2025
    EPS:Jan 15, 2016
    EPSS Score:0.81812
    CVSS Score:9.8

    Affected Products

    Vendor
    Fortinet
    Product
    Fortios

    Exploits

    http://packetstormsecurity.com/files/135225/FortiGate-OS-5.0.7-SSH-Backdoor.htmlhttp://seclists.org/fulldisclosure/2016/Jan/26https://www.exploit-db.com/exploits/39224/http://packetstormsecurity.com/files/135225/FortiGate-OS-5.0.7-SSH-Backdoor.htmlhttp://seclists.org/fulldisclosure/2016/Jan/26https://www.exploit-db.com/exploits/39224/https://www.exploit-db.com/exploits/43386

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-84392 (CVSS 2.7) — A NULL Pointer Dereference vulnerability [CWE-476] vulnerability in Fortinet FortiOS 7.4 all versions, FortiOS…
    CVE-2026-84393 (CVSS 8.1) — A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6,…
    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…

    References

    http://blog.fortinet.com/post/brief-statement-regarding-issues-found-with-fortios
    http://packetstormsecurity.com/files/135225/FortiGate-OS-5.0.7-SSH-Backdoor.html
    http://seclists.org/fulldisclosure/2016/Jan/26
    http://www.fortiguard.com/advisory/multiple-products-ssh-undocumented-login-vulnerability
    http://www.securitytracker.com/id/1034663
    https://twitter.com/esizkur/status/686842135501508608
    https://www.exploit-db.com/exploits/39224/
    http://blog.fortinet.com/post/brief-statement-regarding-issues-found-with-fortios
    http://packetstormsecurity.com/files/135225/FortiGate-OS-5.0.7-SSH-Backdoor.html
    http://seclists.org/fulldisclosure/2016/Jan/26
    http://www.fortiguard.com/advisory/multiple-products-ssh-undocumented-login-vulnerability
    http://www.securitytracker.com/id/1034663
    https://twitter.com/esizkur/status/686842135501508608
    https://www.exploit-db.com/exploits/39224/

    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