#VU54848 Improper authentication in FortiOS - CVE-2021-26088
Published: July 14, 2021 / Updated: September 20, 2024
Vulnerability identifier: #VU54848
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2021-26088
CWE-ID: CWE-287
Exploitation vector: Adjecent network
Exploit availability:
Public exploit is available
Vulnerable software:
FortiOS
FortiOS
Software vendor:
Fortinet, Inc
Fortinet, Inc
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in FSSO Collector when processing authentication requests. A remote attacker can send specifically crafted UDP login notification packets to bypass any firewall authentication rule and access the protected network.
The vulnerability affects both the FSSO DC Agent and Collector.
Remediation
Install updates from vendor's website.