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Fortinet Fortios CVEs.

Published CVEs affecting Fortinet Fortios, ranked by exploit odds.

169 CVEs · updated 2026-11-10 21:26 UTC

  1. CVE-2022-42475

    A heap-based buffer overflow vulnerability [CWE-122] in FortiOS SSL-VPN 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.10, 6.2.0 through 6.2.11, 6.0.15 and earlier and FortiProxy SSL-VPN 7.2.0 through 7.2.1, 7.0.7 and earlier may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests.

    Drop everything exploited Memory safety Network gear Fortinet Fortios

    9.8 CRITICAL 99% exploit odds Fix listed
  2. 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.

    Drop everything Auth & access Network gear Fortinet Fortios

    9.8 CRITICAL 71% exploit odds No fix listed
  3. CVE-2018-13380

    A Cross-site Scripting (XSS) vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.7, 5.4.0 to 5.4.12, 5.2 and below and Fortinet FortiProxy 2.0.0, 1.2.8 and below under SSL VPN web portal allows attacker to execute unauthorized malicious script code via the error or message handling parameters.

    XSS Network gear Fortinet Fortios

    4.7 MEDIUM 62% exploit odds Fix listed
  4. CVE-2016-6909

    Buffer overflow in the Cookie parser in Fortinet FortiOS 4.x before 4.1.11, 4.2.x before 4.2.13, and 4.3.x before 4.3.9 and FortiSwitch before 3.4.3 allows remote attackers to execute arbitrary code via a crafted HTTP request, aka EGREGIOUSBLUNDER.

    Drop everything Memory safety Network gear Fortinet Fortios

    9.8 CRITICAL 50% exploit odds Fix listed
  5. CVE-2020-12812

    An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.

    Drop everything exploited Other Network gear Fortinet Fortios

    9.8 CRITICAL 45% exploit odds Fix listed
  6. CVE-2025-68686

    An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.1, FortiOS 7.4.0 through 7.4.6, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions may allow a remote unauthenticated attacker to bypass the patch developed for the symbolic link persistency mechanism observed in some post-exploit cases, via crafted HTTP requests. An attacker would need first to have compromised the product via another vulnerability, at filesystem level.

    exploited Disclosure Network gear Fortinet Fortios

    5.9 MEDIUM 29% exploit odds Fix listed
  7. CVE-2022-38380

    An improper access control [CWE-284] vulnerability in FortiOS version 7.2.0 and versions 7.0.0 through 7.0.7 may allow a remote authenticated read-only user to modify the interface settings via the API.

    Other Network gear Fortinet Fortios

    4.3 MEDIUM 23% exploit odds Fix listed
  8. CVE-2019-5591

    A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.

    exploited Auth & access Network gear Fortinet Fortios

    6.5 MEDIUM 19% exploit odds Fix listed
  9. CVE-2015-1880

    Cross-site scripting (XSS) vulnerability in the sslvpn login page in Fortinet FortiOS 5.2.x before 5.2.3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

    XSS Network gear Fortinet Fortios

    4.3 MEDIUM 14% exploit odds Fix listed
  10. CVE-2022-41328

    A improper limitation of a pathname to a restricted directory vulnerability ('path traversal') [CWE-22] in Fortinet FortiOS version 7.2.0 through 7.2.3, 7.0.0 through 7.0.9 and before 6.4.11 allows a privileged attacker to read and write files on the underlying Linux system via crafted CLI commands.

    exploited Disclosure Network gear Fortinet Fortios

    6.7 MEDIUM 11% exploit odds Fix listed
  11. CVE-2017-3133

    A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.6.0 and earlier allows attackers to execute unauthorized code or commands via the Replacement Message HTML for SSL-VPN.

    XSS Network gear Fortinet Fortios

    6.1 MEDIUM 11% exploit odds Fix listed
  12. CVE-2017-3132

    A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.6.0 and earlier allows attackers to Execute unauthorized code or commands via the action input during the activation of a FortiToken.

    XSS Network gear Fortinet Fortios

    6.1 MEDIUM 8% exploit odds Fix listed
  13. CVE-2017-3131

    A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.4.0 through 5.4.4 and 5.6.0 allows attackers to execute unauthorized code or commands via the filter input in "Applications" under FortiView.

    XSS Network gear Fortinet Fortios

    5.4 MEDIUM 8% exploit odds Fix listed
  14. CVE-2019-6693

    Use of a hard-coded cryptographic key to cipher sensitive data in FortiOS configuration backup file may allow an attacker with access to the backup file to decipher the sensitive data, via knowledge of the hard-coded key. The aforementioned sensitive data includes users' passwords (except the administrator's password), private keys' passphrases and High Availability password (when set).

    exploited Auth & access Network gear Fortinet Fortios

    6.5 MEDIUM 7% exploit odds Fix listed
  15. CVE-2016-3978

    The Web User Interface (WebUI) in FortiOS 5.0.x before 5.0.13, 5.2.x before 5.2.3, and 5.4.x before 5.4.0 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks or cross-site scripting (XSS) attacks via the "redirect" parameter to "login."

    XSS Network gear Fortinet Fortios

    6.1 MEDIUM 6% exploit odds Fix listed
  16. CVE-2014-2216

    The FortiManager protocol service in Fortinet FortiOS before 4.3.16 and 5.0.0 before 5.0.8 on FortiGate devices allows remote attackers to cause a denial of service and possibly execute arbitrary code via a crafted request.

    Denial of service Network gear Fortinet Fortios

    7.5 HIGH 5% exploit odds Fix listed
  17. CVE-2025-25249

    A heap-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows attacker to execute unauthorized code or commands via specially crafted packets

    exploited Memory safety Network gear Fortinet Fortios

    8.1 HIGH 4% exploit odds Fix listed
  18. CVE-2017-14186

    A Cross-site Scripting (XSS) vulnerability in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.0 to 5.6.7, 5.4 and below versions under SSL VPN web portal allows a remote user to inject arbitrary web script or HTML in the context of the victim's browser via the login redir parameter. An URL Redirection attack may also be feasible by injecting an external URL via the affected parameter.

    Fortinet Fortios

    5.4 MEDIUM 4% exploit odds Fix listed
  19. CVE-2015-7361

    FortiOS 5.2.3, when configured to use High Availability (HA) and the dedicated management interface is enabled, does not require authentication for access to the ZebOS shell on the HA dedicated management interface, which allows remote attackers to obtain shell access via unspecified vectors.

    Auth & access Network gear Fortinet Fortios

    9.3 HIGH 3% exploit odds Fix listed
  20. CVE-2005-3058

    Interpretation conflict in Fortinet FortiGate 2.8, running FortiOS 2.8MR10 and v3beta, allows remote attackers to bypass the URL blocker via an (1) HTTP request terminated with a line feed (LF) and not carriage return line feed (CRLF) or (2) HTTP request with no Host field, which is still processed by most web servers without violating RFC2616.

    Fortinet Fortios

    7.5 HIGH 3% exploit odds Fix listed
  21. CVE-2005-3057

    The FTP component in FortiGate 2.8 running FortiOS 2.8MR10 and v3beta, and other versions before 3.0 MR1, allows remote attackers to bypass the Fortinet FTP anti-virus engine by sending a STOR command and uploading a file before the FTP server response has been sent, as demonstrated using LFTP.

    Other Network gear Fortinet Fortios

    10.0 HIGH 3% exploit odds Fix listed
  22. CVE-2023-29179

    A null pointer dereference in Fortinet FortiOS version 7.2.0 through 7.2.4, 7.0.0 through 7.0.11, 6.4.0 through 6.4.12, Fortiproxy version 7.2.0 through 7.2.4, 7.0.0 through 7.0.10 allows attacker to denial of service via specially crafted HTTP requests.

    Fortinet Fortios

    6.5 MEDIUM 2% exploit odds Fix listed
  23. CVE-2013-7182

    Cross-site scripting (XSS) vulnerability in firewall/schedule/recurrdlg in Fortinet FortiOS 5.0.5 allows remote attackers to inject arbitrary web script or HTML via the mkey parameter.

    Fortinet Fortios

    4.3 MEDIUM 2% exploit odds No fix listed
  24. CVE-2013-1414

    Multiple cross-site request forgery (CSRF) vulnerabilities in Fortinet FortiOS on FortiGate firewall devices before 4.3.13 and 5.x before 5.0.2 allow remote attackers to hijack the authentication of administrators for requests that modify (1) settings or (2) policies, or (3) restart the device via a rebootme action to system/maintenance/shutdown.

    Fortinet Fortios

    5.1 MEDIUM 2% exploit odds No fix listed
  25. CVE-2018-9185

    An information disclosure vulnerability in Fortinet FortiOS 6.0.0 and below versions reveals user's web portal login credentials in a Javascript file sent to client-side when pages bookmarked in web portal use the Single Sign-On feature.

    Fortinet Fortios

    8.1 HIGH 2% exploit odds Fix listed
  26. CVE-2018-13376

    An uninitialized memory buffer leak exists in Fortinet FortiOS 5.6.1 to 5.6.3, 5.4.6 to 5.4.7, 5.2 all versions under web proxy's disclaimer response web pages, potentially causing sensitive data to be displayed in the HTTP response.

    Fortinet Fortios

    7.5 HIGH 2% exploit odds Fix listed
  27. CVE-2015-5965

    The SSL-VPN feature in Fortinet FortiOS before 4.3.13 only checks the first byte of the TLS MAC in finished messages, which makes it easier for remote attackers to spoof encrypted content via a crafted MAC field.

    Fortinet Fortios

    5.0 MEDIUM 2% exploit odds Fix listed
  28. CVE-2021-26109

    An integer overflow or wraparound vulnerability in the memory allocator of SSLVPN in FortiOS before 7.0.1 may allow an unauthenticated attacker to corrupt control data on the heap via specifically crafted requests to SSLVPN, resulting in potentially arbitrary code execution.

    Fortinet Fortios

    8.1 HIGH 2% exploit odds Fix listed
  29. CVE-2005-4570

    The Internet Key Exchange version 1 (IKEv1) implementations in Fortinet FortiOS 2.50, 2.80 and 3.0, FortiClient 2.0,; and FortiManager 2.80 and 3.0 allow remote attackers to cause a denial of service (termination of a process that is automatically restarted) via IKE packets with invalid values of certain IPSec attributes, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1. NOTE: due to the lack of details in the vendor advisory, it is unclear which of CVE-2005-3666, CVE-2005-3667, and/or CVE-2005-3668 this issue applies to.

    Fortinet Fortios

    7.8 HIGH 2% exploit odds Fix listed
  30. CVE-2015-1452

    The Control and Provisioning of Wireless Access Points (CAPWAP) daemon in Fortinet FortiOS 5.0 Patch 7 build 4457 allows remote attackers to cause a denial of service (locked CAPWAP Access Controller) via a large number of ClientHello DTLS messages.

    Fortinet Fortios

    7.8 HIGH 2% exploit odds Fix listed
  31. CVE-2006-3222

    The FTP proxy module in Fortinet FortiOS (FortiGate) before 2.80 MR12 and 3.0 MR2 allows remote attackers to bypass anti-virus scanning via the Enhanced Passive (EPSV) FTP mode.

    Fortinet Fortios

    5.0 MEDIUM 2% exploit odds Fix listed
  32. CVE-2014-8616

    Multiple cross-site scripting (XSS) vulnerabilities in Fortinet FortiOS 5.2.x before 5.2.3 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors to the (1) user group or (2) vpn template menus.

    Fortinet Fortios

    4.3 MEDIUM 2% exploit odds Fix listed
  33. CVE-2019-15705

    An Improper Input Validation vulnerability in the SSL VPN portal of FortiOS versions 6.2.1 and below, and 6.0.6 and below may allow an unauthenticated remote attacker to crash the SSL VPN service by sending a crafted POST request.

    Fortinet Fortios

    7.5 HIGH 2% exploit odds Fix listed
  34. CVE-2017-14182

    A Denial of Service (DoS) vulnerability in Fortinet FortiOS 5.4.0 to 5.4.5 allows an authenticated user to cause the web GUI to be temporarily unresponsive, via passing a specially crafted payload to the 'params' parameter of the JSON web API.

    Fortinet Fortios

    6.5 MEDIUM 2% exploit odds Fix listed
  35. CVE-2017-17544

    A privilege escalation vulnerability in Fortinet FortiOS 6.0.0 to 6.0.6, 5.6.0 to 5.6.10, 5.4 and below allows admin users to elevate their profile to super_admin via restoring modified configurations.

    Fortinet Fortios

    7.2 HIGH 2% exploit odds Fix listed
  36. CVE-2021-36173

    A heap-based buffer overflow in the firmware signature verification function of FortiOS versions 7.0.1, 7.0.0, 6.4.0 through 6.4.6, 6.2.0 through 6.2.9, and 6.0.0 through 6.0.13 may allow an attacker to execute arbitrary code via specially crafted installation images.

    Fortinet Fortios

    8.0 HIGH 2% exploit odds Fix listed
  37. CVE-2016-7542

    A read-only administrator on Fortinet devices with FortiOS 5.2.x before 5.2.10 GA and 5.4.x before 5.4.2 GA may have access to read-write administrators password hashes (not including super-admins) stored on the appliance via the webui REST API, and may therefore be able to crack them.

    Fortinet Fortios

    4.9 MEDIUM 2% exploit odds No fix listed
  38. 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.

    Other Network gear Fortinet Fortios

    6.7 MEDIUM 1% exploit odds Fix listed
  39. CVE-2022-27491

    A improper verification of source of a communication channel in Fortinet FortiOS with IPS engine version 7.201 through 7.214, 7.001 through 7.113, 6.001 through 6.121, 5.001 through 5.258 and before 4.086 allows a remote and unauthenticated attacker to trigger the sending of "blocked page" HTML data to an arbitrary victim via crafted TCP requests, potentially flooding the victim.

    Fortinet Fortios

    6.8 MEDIUM 1% exploit odds Fix listed
  40. CVE-2015-2323

    FortiOS 5.0.x before 5.0.12 and 5.2.x before 5.2.4 supports anonymous, export, RC4, and possibly other weak ciphers when using TLS to connect to FortiGuard servers, which allows man-in-the-middle attackers to spoof TLS content by modifying packets.

    Fortinet Fortios

    6.4 MEDIUM 1% exploit odds Fix listed
  41. CVE-2017-7738

    An Information Disclosure vulnerability in Fortinet FortiOS 5.6.0 to 5.6.2, 5.4.0 to 5.4.5, 5.2 and below versions allow an admin user with super_admin privileges to view the current SSL VPN web portal session info which may contains user credentials through the fnsysctl CLI command.

    Fortinet Fortios

    7.2 HIGH 1% exploit odds Fix listed
  42. CVE-2021-44171

    A improper neutralization of special elements used in an os command ('os command injection') in Fortinet FortiOS version 6.0.0 through 6.0.14, FortiOS version 6.2.0 through 6.2.10, FortiOS version 6.4.0 through 6.4.8, FortiOS version 7.0.0 through 7.0.3 allows attacker to execute privileged commands on a linked FortiSwitch via diagnostic CLI commands.

    Injection Network gear Fortinet Fortios

    9.0 CRITICAL 1% exploit odds Fix listed
  43. CVE-2017-3130

    An information disclosure vulnerability in Fortinet FortiOS 5.6.0, 5.4.4 and below versions allows attacker to get FortiOS version info by inspecting FortiOS IKE VendorID packets.

    Fortinet Fortios

    7.5 HIGH 1% exploit odds Fix listed
  44. CVE-2016-8492

    The implementation of an ANSI X9.31 RNG in Fortinet FortiGate allows attackers to gain unauthorized read access to data handled by the device via IPSec/TLS decryption.

    Fortinet Fortios

    5.9 MEDIUM 1% exploit odds Fix listed
  45. CVE-2023-46714

    A stack-based buffer overflow [CWE-121] vulnerability in Fortinet FortiOS version 7.2.1 through 7.2.6 and version 7.4.0 through 7.4.1 allows a privileged attacker over the administrative interface to execute arbitrary code or commands via crafted HTTP or HTTPs requests.

    Memory safety Network gear Fortinet Fortios

    7.2 HIGH 1% exploit odds Fix listed
  46. CVE-2012-0941

    Multiple cross-site scripting (XSS) vulnerabilities in Fortinet FortiGate UTM WAF appliances with FortiOS 4.3.x before 4.3.6 allow remote attackers to inject arbitrary web script or HTML via vectors involving the (1) Endpoint Monitor, (2) Dialup List, or (3) Log&Report Display modules, or the fields_sorted_opt parameter to (4) user/auth/list or (5) endpointcompliance/app_detect/predefined_sig_list.

    Fortinet Fortios

    6.1 MEDIUM 1% exploit odds Fix listed
  47. CVE-2018-13384

    A Host Header Redirection vulnerability in Fortinet FortiOS all versions below 6.0.5 under SSL VPN web portal allows a remote attacker to potentially poison HTTP cache and subsequently redirect SSL VPN web portal users to arbitrary web domains.

    Fortinet Fortios

    6.1 MEDIUM 1% exploit odds Fix listed
  48. CVE-2025-61624

    An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') [CWE-22] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiPAM 1.7.0, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all versions, FortiPAM 1.2 all versions, FortiPAM 1.1 all versions, FortiPAM 1.0 all versions, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.11, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions, FortiSwitchManager 7.2.0 through 7.2.7, FortiSwitchManager 7.0.0 through 7.0.6 may allow an authenticated attacker with admin profile and at least read-write permissions to write or delete arbitrary files via specific CLI commands.

    exploited Disclosure Network gear Fortinet Fortios

    6.0 MEDIUM 1% exploit odds Fix listed
  49. CVE-2018-13371

    An external control of system vulnerability in FortiOS may allow an authenticated, regular user to change the routing settings of the device via connecting to the ZebOS component.

    Fortinet Fortios

    8.8 HIGH 1% exploit odds Fix listed
  50. CVE-2017-7733

    A Cross-Site-Scripting (XSS) vulnerability in Fortinet FortiOS 5.4.0 to 5.4.5 and 5.6.0 allows a remote unauthenticated attacker to execute arbitrary javascript code via webUI "Login Disclaimer" redir parameter.

    Fortinet Fortios

    6.1 MEDIUM 1% exploit odds Fix listed

All CVEs affecting Fortinet Fortios that appear in CVE.org and NVD, sorted by how likely they are to be exploited (EPSS), with fix status and timeline.