CVE-2026-84393
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk19th percentile - higher than 19% of all known CVEs
Summary
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 <insert attack vector here>
Risk Assessment
An attacker may exploit the certificate mismatch to intercept or disclose confidential data transmitted by clients.
Recommendation
Upgrade FortiOS and FortiProxy to patched versions or contact the vendor for available updates.
Other vulnerabilities in FortiOS / FortiProxy
See all- CVE-2024-21762CriticalActively exploited
An out-of-bounds write vulnerability in Fortinet FortiOS and FortiProxy across multiple versions. It allows an attacker to execute unauthorized code or commands via specifically crafted requests.
- CVE-2025-54822Medium
An improper authorization vulnerability (CWE-285) in Fortinet FortiOS and FortiProxy allows an authenticated attacker to access static files of other VDOMs via crafted HTTP or HTTPS requests. Affects multiple versions of FortiOS (7.4.0-7.4.1, 7.2.0-7.2.8, 7.0.0-7.0.11) and FortiProxy (7.4.0-7.4.8, 7.2, 7.0, 2.0).
- CVE-2023-22640High
An out-of-bounds write vulnerability in Fortinet FortiOS and FortiProxy allows an authenticated attacker to execute unauthorized code or commands via specifically crafted requests.
- CVE-2022-42476High
A relative path traversal vulnerability (CWE-23) in Fortinet FortiOS (7.2.0–7.2.3, 7.0.0–7.0.8, 6.4.0–6.4.11, 6.2.0–6.2.12) and FortiProxy (7.2.0–7.2.1, 7.0.0–7.0.7, 2.0.0–2.0.11, 1.2, 01.02, 1.1, 01.01) allows privileged VDOM administrators to escalate to super admin via crafted CLI requests.
- CVE-2022-42472Medium
Fortinet FortiOS and FortiProxy contain an improper neutralization of CRLF sequences in HTTP headers (HTTP response splitting). An authenticated remote attacker can perform an HTTP request splitting attack, gaining control of the remaining headers and body of the response.
Original NVD description (English source)
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 <insert attack vector here>
Vulnerability data from NVD (NIST) · CISA KEV · EPSS