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: 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: 8.8
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: 4.8
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: 7.3
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: 3.4
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: 5.1
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: 5.0
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: 4.1
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: 5.3
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: 6.7
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: 7.0
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: 5.0
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: 5.9
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: 6.9
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: 7.7
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: 7.5
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: 3.9
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: 6.2
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: 6.0
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: 9.1
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: 2.6
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: 7.9
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
CVSSv3 Score: 1.8
An Improper Privilege Management vulnerability [CWE-269] in FortiOS, FortiProxy and FortiPAM may allow an authenticated administrator to bypass the trusted host policy via crafted CLI command.
Revised on 2026-05-27 00:00:00
CVSSv3 Score: 5.9
CVE-2025-26466A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.
Revised on 2026-05-25 00:00:00
CVSSv3 Score: 7.8
CVE-2026-31431In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.
Revised on 2026-05-13 00:00:00
CVSSv3 Score: 4.0
An Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') vulnerability [CWE-88] in FortiDeceptor WEB UI may allow an authenticated attacker with at least read-only admin permission to read log files via HTTP crafted requests.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 6.1
An improper neutralization of special elements used in an OS command ("OS Command Injection") vulnerability [CWE-78] in FortiAP, FortiAP-U & FortiAP-W2 CLI may allow an authenticated privileged attacker to execute unauthorized code or commands via crafted CLI requests.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 5.2
A use of potentially Dangerous Function vulnerability [CWE-676] in FortiAnalyzer and FortiManager API may allow an authenticated attacker to cause a system hang via multiple specially crafted HTTP requests causing crashes. This happens if internal locks are aligned, which is out of control of the attacker.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 2.1
A Missing Authorization [CWE-862] in FortiClient Windows may allow an authenticated local attacker to decrypt a currently logged in users VPN password via use of an unprotected DLL function.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 9.1
An Improper Access Control vulnerability [CWE-284] in FortiAuthenticator may allow an unauthenticated attacker to execute unauthorized code or commands via crafted requests.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 9.1
A missing authorization vulnerability [CWE-862] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 6.5
An OS command injection vulnerabtility [CWE-78] in FortiAP and FortiAP-W2 cli may allow an authenticated attacker to execute unauthorized code or commands via a specifically crafted cli command.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 5.0
An improper export of Android application components [CWE-926] in FortiTokenAndroid may allow other applications on the device to read the OTP code via an exported Content Provider URI.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 8.3
An Out-Of-Bounds Write vulnerability [CWE-787] in FortiOS capwap daemon may allow an attacker controlling an authenticated FortiAP FortiExtender or FortiSwitch to gain execution privileges on the FortiGate device
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 6.3
An improper neutralization of special elements used in an SQL Command ('SQL Injection') vulnerability [CWE-89] in FortiMail may allow an authenticated privileged attacker to execute unauthorized code or commands via specifically crafted HTTP or HTTPS requests.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 5.1
An improper neutralization of special elements used in an SQL command ('SQL injection') vulnerability [CWE-89] in FortiNDR may allow an authenticated attacker to execute arbitrary SQL commands on selected databases and tables via specifically crafted HTTP requests.
Revised on 2026-05-12 00:00:00
CVSSv3 Score: 6.7
An out-of-bounds write vulnerability [CWE-787] in FortiWeb CGI daemon may allow a remote privileged attacker to execute arbitrary code or command via crafted HTTP requests.
Revised on 2026-04-15 00:00:00
CVSSv3 Score: 6.7
An Improper authentication vulnerability [CWE-287] in FortiSOAR web GUI may allow an unauthenticated attacker to bypass authentication via replaying captured 2FA request. The attack requires being able to intercept and decrypt authentication traffic and precise timing to replay the request before token expiration.
Revised on 2026-04-14 00:00:00
CVSSv3 Score: 6.2
An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability [CWE-22] in FortiSandbox, FortiSandbox Cloud, FortiSandbox PaaS and FortiSandbox Cloud WEB UI may allow a privileged attacker with super-admin profile and CLI access to delete an arbitrary directory via HTTP crafted requests.
Revised on 2026-04-14 00:00:00
On March 31, 2026, the Axios npm package was compromised via a maintainer account takeover. Two malicious versions were published - axios@1.14.1 and axios@0.30.4 - which introduced a hidden dependency (plain-crypto-js@4.2.1) able to execute a post‑install script deploying a cross‑platform Remote Access Trojan (RAT) on Windows, macOS, and Linux systems.
Revised on 2026-04-14 00:00:00
CVSSv3 Score: 4.1
A Storing Passwords in a Recoverable Format vulnerability [CWE-257] in FortiSOAR may allow an authenticated remote attacker to retrieve Service account password via server address modification in LDAP configuration.
Revised on 2026-04-14 00:00:00
CVSSv3 Score: 4.1
A Storing Passwords in a Recoverable Format vulnerability [CWE-257] in FortiSOAR may allow an authenticated remote attacker to retrieve passwords for multiple installed connectors via server address modification in connector configuration.
Revised on 2026-04-14 00:00:00
CVSSv3 Score: 6.2
A Cleartext Transmission of Sensitive Information vulnerability [CWE-319] in FortiSOAR may allow an authenticated attacker to view cleartext password in response for Secure Message Exchange and Radius queries, if configured
Revised on 2026-04-14 00:00:00
CVSSv3 Score: 2.5
An Insufficiently protected credentials vulnerability [CWE-522] in FortiSanbox and FortiSanbox PaaS GUI may allow an authenticated administrator to read LDAP server credentials via client-side inspection.
Revised on 2026-04-14 00:00:00
CVSSv3 Score: 5.2
A use of hard-coded cryptographic key vulnerability [CWE 321] in FortiClientEMS may allow an attacker in possession of an encrypted dump of the database to decrypt it.
Revised on 2026-04-14 00:00:00