CVE-2026-70465: Buffer Overflow

Published Aug 12, 2026
·
Updated

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 Software

2 affected components
Fortinet FortiClientWindows>=7.4.0<=7.4.3
Fortinet FortiClientWindows>=7.2.0<=7.2.11

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Fortinet FortiClientWindows to a version that resolves this vulnerability.

    Fixed in 7.2.12
  2. Upgrade

    Upgrade Fortinet FortiClientWindows to a version that resolves this vulnerability.

    Fixed in 7.4.4

Event History

Aug 12, 2026
CVE Published
via MITRE·11:52 AM
Data Sourced
via MITRE·11:52 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·12:19 PM
DescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2026-70465?

The severity of CVE-2026-70465 is rated high with a CVSS score of 7.3.

2

How do I fix CVE-2026-70465?

To fix CVE-2026-70465, update FortiClientWindows to version 7.4.4 or later, and 7.2.12 or later.

3

What type of vulnerability is CVE-2026-70465?

CVE-2026-70465 is classified as a classic buffer overflow vulnerability.

4

Who is affected by CVE-2026-70465?

CVE-2026-70465 affects Fortinet FortiClientWindows versions 7.4.0 to 7.4.3 and 7.2.0 to 7.2.11.

5

Can CVE-2026-70465 be exploited remotely?

Yes, CVE-2026-70465 can be exploited remotely by an unauthenticated attacker who can craft DNS responses.

Company

Resources

Contact

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CVE-2026-70465 - Buffer Overflow - SecAlerts