The vulnerability of FortiOS operating systems and FortiProxy proxy servers related to improper verification of certificate authenticity allows attackers to compromise the confidentiality, integrity, and accessibility of protected information.

The vulnerability of the FortiOS operating systems and the FortiProxy proxy server for protecting against Internet attacks is related to improper verification of certificate authenticity. Exploiting this vulnerability allows a malicious actor to compromise the confidentiality, integrity, and...

Fortinet Fortigate ZTNA Portal Improper Certificate Validation (FG-IR-26-174)

The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-174 advisory. - A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy...

Fortinet Fortigate Null Pointer Dereference in Log Report (FG-IR-26-173)

The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-173 advisory. - A NULL Pointer Dereference vulnerability CWE-476 vulnerability in Fortinet FortiOS 7.4 all versions, FortiOS 7.2 all...

VulnCheck KEV: CVE-2025-25252

An Insufficient Session Expiration vulnerability CWE-613 in FortiOS SSL VPN 7.6.0 through 7.6.2, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.0 through 7.0.16, 6.4 all versions may allow a remote attacker e.g. a former admin whose account was removed and whose session was terminated in possessi...

Vulnerability fixed in Fortinet FortiOS

Fortinet has fixed a vulnerability in FortiOS FortiSASE and FortiSwitchManager specifically. The vulnerability is located in the cwacd daemon in FortiOS and FortiSwitchManager. This daemon is vulnerable to exploitation by remote, unauthenticated attackers. By sending specially crafted packets or...

CISA Flags Exploited Cisco, Citrix, Fortinet Flaws, Sets Sept. 12 Federal Patch Deadline

The U.S. Cybersecurity and Infrastructure Security Agency CISA on Wednesday added three flaws, each impacting Cisco, Citrix, and Fortinet, to its Known Exploited Vulnerabilities KEV catalog, requiring Federal Civilian Executive Branch FCEB agencies to apply the patches by September 12, 2026. The...

Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability

Fortinet FortiOS, FortiSwitchManager, and FortiSASE contain a heap-based buffer overflow vulnerability that allows an attacker to execute unauthorized code or commands via specially crafted packets...

CVE-2026-84393

A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via...

CVE-2026-84392

A NULL Pointer Dereference (CWE-476) in Fortinet FortiOS (7.2 all, 7.4 all), FortiPAM (1.0 through 1.9.0), and FortiProxy (7.2 all, 7.4 all, 7.6.0–7.6.6) allows an authenticated attacker to crash the httpsd daemon via crafted HTTP requests. The CVSS 3.1 score is 2.7 (Low) , reflecting high privil...

EUVD-2026-72930

A NULL Pointer Dereference vulnerability CWE-476 vulnerability in Fortinet FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiPAM 1.9.0, FortiPAM 1.8 all versions, FortiPAM 1.7 all versions, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all...

CVE-2026-84392

A NULL Pointer Dereference vulnerability CWE-476 vulnerability in Fortinet FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiPAM 1.9.0, FortiPAM 1.8 all versions, FortiPAM 1.7 all versions, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all...

EUVD-2026-72927

A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via...

CVE-2026-84393

A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via...

CVE-2026-84393

Fortinet FortiOS 7.6.1 through 7.6.6 and FortiProxy 7.6.2 through 7.6.6 are affected by an improper validation of certificate with host mismatch vulnerability that may allow a remote attacker to achieve information disclosure . The attack requires high complexity and no user interaction or prior ...

CVE-2026-84393

A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via...

Null Pointer Dereference in Log Report

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CVE-2026-84392: NULL Pointer Dereference

A NULL Pointer Dereference vulnerability CWE-476 vulnerability in Fortinet FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiPAM 1.9.0, FortiPAM 1.8 all versions, FortiPAM 1.7 all versions, FortiPAM 1.6 all versions, FortiPAM 1.5 all versions, FortiPAM 1.4 all versions, FortiPAM 1.3 all...

VulnCheck KEV: CVE-2025-25249

Fortinet FortiOS, FortiSwitchManager, and FortiSASE contain a heap-based buffer overflow vulnerability that allows an attacker to execute unauthorized code or commands via specially crafted packets...

ZTNA Portal Improper Certificate Validation

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CVE-2026-84393: Improper Validation of Certificate with Host Mismatch

A improper validation of certificate with host mismatch vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6, FortiProxy 7.6.2 through 7.6.6 may allow attacker to information disclosure via...