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CVE-2021-41025

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-08 · updated 2026-06-17
• Weakness: CWE-362

Description

Multiple vulnerabilities in the authentication mechanism of confd in FortiWeb versions 6.4.1, 6.4.0, 6.3.0 through 6.3.15, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 thorugh 6.0.7, including an instance of concurrent execution using shared resource with improper synchronization and one of authentication bypass by capture-replay, may allow a remote unauthenticated attacker to circumvent the authentication process and authenticate as a legitimate cluster peer.

Affected products

• Fortinet FortiWeb: from 6.0.0 through 6.0.7; from 6.2.0 through 6.2.6; from 6.3.0 through 6.3.15; 6.1.0, 6.1.1, 6.1.2, 6.4.0, 6.4.1, 6.4.2

References

• https://fortiguard.com/advisory/FG-IR-21-130
• https://fortiguard.com/advisory/FG-IR-21-130

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