CVE-2021-42757

A buffer overflow [CWE-121] in the TFTP client library of FortiOS before 6.4.7 and FortiOS 7.0.0 through 7.0.2, may allow an authenticated local attacker to achieve arbitrary code execution via specially crafted command line arguments.

Score

CVSS 3.1 6.7 Medium

Status

Modified - psirt@fortinet.com

Published

2021-12-08

Last modified

2025-10-16

Weaknesses

CWE-120, CWE-787

Affected products

• Fortiadc (Fortinet)
• Fortianalyzer (Fortinet)
• Fortiddos (Fortinet)
• Fortiddos-f (Fortinet)
• Fortimail (Fortinet)
• Fortimanager (Fortinet)
• Fortindr (Fortinet)
• Fortios (Fortinet)
• Fortios-6k7k (Fortinet)
• Fortiportal (Fortinet)
• Fortiproxy (Fortinet)
• Fortirecorder (Fortinet)
• Fortirecorder Firmware (Fortinet)
• Fortiswitch (Fortinet)
• Fortivoice (Fortinet)
• Fortiweb (Fortinet)

References

• https://fortiguard.com/advisory/FG-IR-21-173