What’s Vulnerable › Vulnerabilities
CVE-2021-26088
- Severity: critical (CVSS 9.6 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-07-12 · updated 2026-06-17
- Weakness: CWE-287
Description
An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.
Affected products
- Fortinet FSSO Windows DC Agent, FSSO Windows CA: before 6.4.6; from 7.0.0 before 7.0.1 — fixed in 6.4.6, 7.0.1
How to fix
Upgrade to a fixed version: Fortinet FSSO Windows DC Agent, FSSO Windows CA 6.4.6, 7.0.1. Check the vendor advisory for mitigations.
References
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