What’s Vulnerable › Vulnerabilities

CVE-2021-26092

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-24 · updated 2026-06-17
• Weakness: CWE-79

Description

Failure to sanitize input in the SSL VPN web portal of FortiOS 5.2.10 through 5.2.15, 5.4.0 through 5.4.13, 5.6.0 through 5.6.14, 6.0.0 through 6.0.12, 6.2.0 through 6.2.7, 6.4.0 through 6.4.4; and FortiProxy 1.2.0 through 1.2.9, 2.0.0 through 2.0.1 may allow a remote unauthenticated attacker to perform a reflected Cross-site Scripting (XSS) attack by sending a request to the error page with malicious GET parameters.

Affected products

• Fortinet FortiOS (FortiGate): from 5.2.10 through 5.2.15; from 5.4.0 through 5.4.13; from 5.6.0 through 5.6.14; from 6.0.0 through 6.0.12; from 6.2.0 through 6.2.7; from 6.4.0 through 6.4.4
• Fortinet FortiProxy: from 1.2.0 through 1.2.9; 2.0.0, 2.0.1

References

• https://fortiguard.com/psirt/FG-IR-20-199
• https://fortiguard.com/psirt/FG-IR-20-199

Get alerted when CVE-2021-26092 or the next vulnerability affects your stack