CVE-2026-70465 PUBLISHED

Assigner: fortinet
Reserved: 04.08.2026 Published: 12.08.2026 Updated: 12.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CVSS Score: 7.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Fortinet
Product	FortiClientWindows
Versions	Default: unaffected affected from 7.4.0 to 7.4.3 (incl.) affected from 7.2.0 to 7.2.11 (incl.)

Solutions

Upgrade to FortiClientWindows version 7.4.4 or above Upgrade to FortiClientWindows version 7.2.12 or above

References

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

Problem Types

Escalation of privilege CWE