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 CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Fortinet FortiClientWindows unaffected
Version Status Constraints
7.4.0 affected ≤ 7.4.3
7.2.0 affected ≤ 7.2.11

No data.

No data.

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Vendors Products
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Forticlientwindows Subscribe

Project Subscriptions

Vendors Products
Fortinet Subscribe
Forticlientwindows Subscribe
Advisories

No advisories yet.

Fixes

Solution

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

Workaround

No workaround given by the vendor.

References
Link Providers
https://fortiguard.fortinet.com/psirt/FG-IR-26-156 cve-icon cve-icon
History

Wed, 12 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 12 Aug 2026 12:15:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Fortinet
Fortinet forticlientwindows
Weaknesses CWE-120
CPEs cpe:2.3:a:fortinet:forticlientwindows:7.2.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.10:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.11:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.3:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.4:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.5:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.8:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.2.9:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.4.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.4.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.4.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:forticlientwindows:7.4.3:*:*:*:*:*:*:*
Vendors & Products Fortinet
Fortinet forticlientwindows
References
Metrics cvssV3_1

{'score': 7.3, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: fortinet

Published:

Updated: 2026-08-12T12:26:28.040Z

Reserved: 2026-08-04T15:01:40.657Z

Link: CVE-2026-70465

cve-icon Vulnrichment

Updated: 2026-08-12T12:26:24.711Z

cve-icon NVD

Status : Received

Published: 2026-08-12T12:19:47.017

Modified: 2026-08-12T13:17:24.770

Link: CVE-2026-70465

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-12T18:15:02Z

Weaknesses