The following is a list of advisories for issues resolved in Fortinet products. The resolution of such issues is coordinated by the Fortinet Product Security Incident Response Team (PSIRT), a dedicated, global team that manages the receipt, investigation, and public reporting of information about security vulnerabilities and issues related to Fortinet products and services.
CVSSv3 Score: 9.4
An Improper limitation of a pathname to a restricted directory ('path traversal') [CWE-22] in FortiSIEM may allow an unauthenticated attacker to execute unauthorized code or commands via specially crafted packets.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 3.4
A missing authorization vulnerability [CWE-862] in FortiSIEM GUI may allow an authenticated attacker to execute unauthorized code or commands via Specially crafted HTTP requests
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 2.1
A Double Free vulnerability [CWE-415] in FortiOS, FortiProxy and FortiSwitch may allow a local authenticated attacker to crash the newcli daemon via crafted CLI commands.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 4.9
A Use of Hard-coded Cryptographic Key [CWE-321] in FortiSandbox and FortiSandbox Cloud API may allow an unauthenticated attacker to access some endpoints via specially crafted HTTP requests
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 6.7
An Improper Locking vulnerability [CWE-667] in FortiOS may allow an unauthenticated attacker with network access to the device to cause a denial of service of the HTTPS management interface via crafted HTTP requests.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 4.9
An improper neutralization of script-related HTML tags in a web page in FortiManager and FortiAnalyzer may allow an attacker to perform a cross site scripting (XSS) attack via the Identify Provider name field.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 9.6
An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] in FortiSandbox GUI may allow a remote unauthenticated attacker to bypass authentication via crafted HTTP requests.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 7.9
An Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability [CWE-89] in FortiAnalyzer, FortiManager, FortiManager Cloud and FortiAnalyzer Cloud may allow a low privileged user to execute arbitrary commands via crafted requests.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 4.8
An Uncaught Exception vulnerability [CWE-248] in FortiSandbox may allow a privileged attacker to deny access to the GUI and CLI persistently via crafted HTTP requests.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 7.7
An improper neutralization of special elements used in an SQL Command ("SQL Injection") vulnerability [CWE-89] in FortiMail webmail may allow an authenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 5.3
An improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] in FortiManager fgfmd daemon may allow a remote attacker impersonating a fortimanager cluster node to execute unauthorized code or commands via specially crafted packets. Impersonation of a Fortimanager cluster node requires possessing the node's certificate and private key.
Revised on 2026-10-13 00:00:00
CVSSv3 Score: 9.8
An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') [CWE-22] and Improper Neutralization of NULL Byte or NULL Character [CWE-158] vulnerability may allow an unauthenticated attacker to write arbitrary files on the underlying system via crafted HTTP or HTTPS requests.This has been reported to be exploited in the wild, customers are urged to apply the workaround below.
Revised on 2026-10-07 00:00:00
CVSSv3 Score: 5.1
An Unverified Ownership Vulnerability [CWE-283] in FortiClient Windows fortimon3 driver may allow an authenticated attacker to terminate arbitrary processes via an exposed minifilter communication port.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 5.4
An Improper Access control vulnerability [CWE-284] in FortiSOAR may allow an authenticated attacker with zero permissions to subscribe to websocket streams and topics and to inject broadcast messages to the stream via crafted websocket requests
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 7.2
An Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability [CWE-77] in FortiSandbox may allow a privileged attacker to execute unauthorized code or commands via crafted HTTP requests.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 9.6
An improper authentication vulnerability [CWE-287] in the Fortinet Privileged Access Agent Chrome Extension may allow a remote unauthenticated attacker to proxy a user's browser traffic through attacker controlled servers if the user visits a malicious website.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 9.8
An Inclusion of Sensitive Information in Source Code vulnerability [CWE-540] in FortiMonitorOnSight web portal may allow a remote unauthenticated attacker to bypass authentication via forged or reused JWT
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 2.7
A NULL Pointer Dereference vulnerability [CWE-476] in FortiOS, FortiProxy and FortiPAM may allow an authenticated attacker to crash the httpsd daemon via crafted HTTP requests.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 3.1
An URL redirection to untrusted site ('open redirect') [CWE-601] vulnerability in FortiSIEM may allow an authenticated attacker to cause a redirection to any website via specially crafted HTTP requests
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 9.9
An improper access control vulnerability [CWE-284] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to access sensitive information via crafted HTTP requests.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 6.5
A Use of Uninitialized Variable [CWE-457] vulnerability in Fortinet FortiAnalyzer SNMP daemon may allow a remote authenticated attacker with user permission to cause a denial of service via SNMP GETBULK requests.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 4.9
An improper access control vulnerability [CWE-284] in FortiManager may allow an administrator to bypass the approval process for workflow sessions via crafted HTTP or HTTPs requests.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 8.1
An improper certificate validation vulnerability [CWE-295] in FortiOS and FortiProxy Agentless ZTNA portal may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the ZTNA portal and the backend destination website.
Revised on 2026-09-08 00:00:00
CVSSv3 Score: 7.5
A security advisory was released affecting the version of OpenSSL library used in some Fortinet products:CVE-2022-0778:The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters.Thus vulnerable situations include:TLS clients consuming server certificatesTLS servers consuming client certificatesHosting providers taking certificates or private keys from customersCertificate authorities parsing certification requests from subscribersAnything else which parses ASN.1 elliptic curve parametersAlso any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue.In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature.This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022.Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).
Revised on 2026-08-27 00:00:00
CVSSv3 Score: 5.8
CVE-2026-49975Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.
Revised on 2026-08-19 00:00:00
CVSSv3 Score: 9.8
An Improper Authentication vulnerability [CWE-287] in the FortiWeb Remote Radius Type Admin Authentication configured with specific, non-default settings may allow a remote unauthenticated attacker to login into the Fortiweb GUI/CLI with a random username and password
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 5.3
An incomplete list of disallowed inputs [CWE-184] in FortiWeb WAF may allow an unauthenticated attacker to bypass policies via specifically crafted requests.
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 8.1
An Authentication Bypass Using an Alternate Path or Channel [CWE-288] vulnerability in FortiManager and FortiManager Cloud may allow a remote unauthenticated attacker to impersonate any FortiGate managed by the FortiManager with a specific CLI option set via crafted FGFM requests if the attacker has a valid certificate.
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 7.3
A buffer copy without checking size of input vulnerability [CWE-120] in FortiClient Windows may allow an unauthenticated attacker in a position to alter or craft DNS responses to the targeted host to execute arbitrary code via malicious packets.
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 3.8
A Server-Side request forgery (SSRF) [CWE-918] vulnerability in FortiSIEM GUI may allow an authenticated attacker to send HTTP requests originating from the targeted device via specially crafted HTTP requests
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 5.6
A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiOS explicit proxy may allow an unauthenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, only if the explicit proxy is configured with Kerberos authentication and SOCKS enabled.
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 5.3
An Allocation of Resources Without Limits or Throttling vulnerability [CWE-770] in FortiOS may allow an unauthenticated attacker to perform a slow HTTP DoS attack on the web interface via crafted HTTP requests.
Revised on 2026-08-12 00:00:00
CVSSv3 Score: 4.3
A buffer over-read vulnerability [CWE-126] in FortiOS, FortiProxy, and FortiSASE may allow an authenticated remote attacker to return a portion of device memory in the redirect response via submitting a specially crafted request.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 5.9
An Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability [CWE-80] in FortiSIEM may allow a privileged administrator to execute unauthorized commands via crafted requests.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 3.4
An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] in FortiOS and FortiProxy may allow an attacker in possession of a valid web filter override token to inject arbitrary headers via tricking a user into clicking on a crafted link.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 3.1
An Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') vulnerability [CWE-113] in FortiOS and FortiProxy captive portal may allow an attacker able to intercept and modify a user's authentication request to inject arbitrary headers via crafted HTTP requests.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 7.5
An Improper Certificate Validation vulnerability [CWE-295] in FortiClient EMS may allow a remote unauthenticated attacker to impersonate an AD Connector via a valid API Key.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 7.5
An out of bounds read [CWE-125] vulnerability in FortiAuthenticator may allow a remote unauthenticated attacker to retrieve sensitive information via a specially crafted request.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 5.5
An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability [CWE-22] in FortiOS, FortiPAM, FortiProxy and FortiSwitch Manager may allow a privileged authenticated attacker with physical access to the device to delete the file system via crafted CLI commands.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 6.1
An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiOS, FortiProxy, FortiPAM and FortiSwitch-Manager Agentless SSL-VPN may allow an authenticated remote user to execute code or commands via crafted requests.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 6.6
A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiOS, FortiProxy and FortiPAM may allow a privileged authenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands via crafted HTTP requests.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 7.5
An Improper Restriction of Communication Channel to Intended Endpoints [CWE-923] vulnerability in FortiSIEM Windows Agent may allow an unauthorized attacker on the same local network to execute arbitrary code via spoofing the supervisors hostname when the Windows device is configured with the 'Supers Override' feature.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 8.6
An Exposure of Resource to Wrong Sphere vulnerability [CWE-668] in FortiSandbox may allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests.
Revised on 2026-07-14 00:00:00
CVSSv3 Score: 8.1
An Authentication Bypass by Primary Weakness vulnerability [CWE-305] in FortiOS fnbamd may allow an unauthenticated attacker to bypass LDAP authentication of Agentless VPN or FSSO policy, under specific LDAP server configuration.
Revised on 2026-07-04 00:00:00
CVSSv3 Score: 4.3
An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] in FortiOS SSL-VPN web-mode may allow an authenticated user to access full SSL-VPN settings via crafted URL.
Revised on 2026-06-15 00:00:00
CVSSv3 Score: 6.5
An improper access control vulnerability [CWE-284] in FortiPortal API endpoints may allow a remote privileged attacker with organization user role to obtain sensitive network configuration data via crafted HTTP requests.
Revised on 2026-06-09 00:00:00
CVSSv3 Score: 6.7
An Internal Asset Exposed to Unsafe Debug Access Level or State vulnerability [CWE-1244] in FortiOS and FortiProxy may allow an authenticated admin to execute lua scripts via crafted CLI commands.
Revised on 2026-06-09 00:00:00
CVSSv3 Score: 9.8
An improper neutralization of special elements used in an OS command vulnerability [CWE-78] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.
Revised on 2026-06-09 00:00:00
CVSSv3 Score: 2.7
An Insertion of Sensitive Information into Log File vulnerability [CWE-532] in FortiOS may allow an attacker with at least read-only privileges to retrieve sensitive 2FA-related information via observing logs or via diagnose command.
Revised on 2026-06-08 00:00:00
CVSSv3 Score: 8.8
Linux kernel is impacted by CVE-2026-43284 and CVE-2026-43500 which chained together create the Dirty Frag vulnerability.CVE-2026-43284In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags MSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter(), so later paths that may modify packet data can first make a private copy. The IPv4/IPv6 datagram append paths did not set this flag when splicing pages into UDP skbs. That leaves an ESP-in-UDP packet made from shared pipe pages looking like an ordinary uncloned nonlinear skb. ESP input then takes the no-COW fast path for uncloned skbs without a frag_list and decrypts in place over data that is not owned privately by the skb. Mark IPv4/IPv6 datagram splice frags with SKBFL_SHARED_FRAG, matching TCP. Also make ESP input fall back to skb_cow_data() when the flag is present, so ESP does not decrypt externally backed frags in place. Private nonlinear skb frags still use the existing fast path. This intentionally does not change ESP output. In esp_output_head(), the path that appends the ESP trailer to existing skb tailroom without calling skb_cow_data() is not reachable for nonlinear skbs: skb_tailroom() returns zero when skb->data_len is nonzero, while ESP tailen is positive. Thus ESP output will either use the separate destination-frag path or fall back to skb_cow_data().CVE-2026-43500In the Linux kernel, the following vulnerability has been resolved: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries externally-owned paged fragments (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via __ip_append_data, or a chained skb_has_frag_list()) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate to also unshare when skb_has_frag_list() or skb_has_shared_frag() is true. This catches the splice-loopback vector and other externally-shared frag sources while preserving the zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC page_pool RX, GRO). The OOM/trace handling already in place is reused.
Revised on 2026-06-03 00:00:00