CVE-2026-70465
published 2026-08-12CVE-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…
PriorityP353high8.1CVSS 3.1
AVNACHPRNUINSUCHIHAH
EPSS
0.52%
41.9th percentile
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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| fortinet | forticlient | >= 7.2.0 < 7.2.12 | 7.2.12 |
| fortinet | forticlient | >= 7.4.0 < 7.4.4 | 7.4.4 |
| fortinet | forticlientwindows | — | — |
| fortinet | forticlientwindows | 7.2.0 – 7.2.11 | — |
| fortinet | forticlientwindows | 7.4.0 – 7.4.3 | — |
| fortinet | fortinet | — | — |
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Fortinet
Heap overflow in kernel driver due to missing size validation
vendor_fortinet·2026-08-12·CVSS 8.1
CVE-2026-70465 [HIGH] CWE-120 Heap overflow in kernel driver due to missing size validation
FG-IR-26-156: Heap overflow in kernel driver due to missing size validation
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.
CVEs: CVE-2026-70465
CWEs: CWE-120
CVSS: 8.1 (high)
Affected products: FortiClientWindows, Fortinet
GHSA
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 unauthen
ghsa_unreviewed·2026-08-12
CVE-2026-70465 [HIGH] CWE-120 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 unauthen
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.
No detection rules found.
No public exploits indexed.
2026-08-12
Published