CVE-2026-70465

A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.2.0 through 7.2.11 may allow an unauthenticated attacker in a position to alter or craft DNS responses to the targeted host to execute arbitrary code via malicious packets.

Score

CVSS 3.1 8.1 High

Status

Analyzed - psirt@fortinet.com

Published

2026-08-12

Last modified

2026-10-24

Weaknesses

CWE-120

Affected products

• Forticlient (Fortinet)
• Forticlientwindows (Fortinet)

References

• https://fortiguard.fortinet.com/psirt/FG-IR-26-156