What is CVE-2026-70465?

CVE-2026-70465 is a high-severity vulnerability in Fortinet Forticlientwindows, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2026-08-12.

How severe is CVE-2026-70465?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Fortinet Forticlientwindows

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…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Fortinet Forticlientwindows — versions 7.4.0, 7.2.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

psirt@fortinet.com

Frequently asked questions

What is CVE-2026-70465?: CVE-2026-70465 is a high-severity vulnerability in Fortinet Forticlientwindows, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2026-08-12.
How severe is CVE-2026-70465?: High severity. CVSS v3 base score is 8.1 out of 10.