FortiClient Windows/mac Origin Validation RCE (<=7.4.7)
CVE-2026-121529 Published on November 10, 2026

A origin validation error vulnerability in Fortinet FortiClientMac 7.4.0 through 7.4.7, FortiClientWindows 7.4.0 through 7.4.7, FortiClientWindows 7.2.0 through 7.2.14, FortiClientWindowsPAM 7.4.7, FortiClientWindowsPAM 7.2.14 may allow an unauthorized remote attacker to execute unauthorized code or commands. Successful exploitation requires interaction with the victim.

NVD

Vulnerability Analysis

CVE-2026-121529 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

Exploitation:
NONE
Automatable:
YES
Technical Impact:
TOTAL
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Origin Validation Error

The software does not properly verify that the source of data or communication is valid.


Products Associated with CVE-2026-121529

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Fortinet Forticlientmac
Fortinet Forticlientwindows
Fortinet Forticlientwindowspam

Affected Versions

Fortinet FortiClientMac: Fortinet FortiClientWindows: Fortinet FortiClientWindowsPAM:

Exploit Probability

EPSS
0.22%
Percentile
12.38%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.