Fortinet FortiOS Heap Buffer Overflow CVE-2025-57740 (v<7.6.2/7.4.7/7.2.10)
CVE-2025-57740 Published on October 14, 2025

An Heap-based Buffer Overflow vulnerability [CWE-122] in FortiOS version 7.6.2 and below, version 7.4.7 and below, version 7.2.10 and below, 7.0 all versions, 6.4 all versions; FortiPAM version 1.5.0, version 1.4.2 and below, 1.3 all versions, 1.2 all versions, 1.1 all versions, 1.0 all versions and FortiProxy version 7.6.2 and below, version 7.4.3 and below, 7.2 all versions, 7.0 all versions RDP bookmark connection may allow an authenticated user to execute unauthorized code via crafted requests.

NVD

Vulnerability Analysis

CVE-2025-57740 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().


Products Associated with CVE-2025-57740

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2025-57740 are published in these products:

Fortinet Fortipam
 
Fortinet FortiOS
 
Fortinet FortiProxy
 

Affected Versions

Fortinet FortiPAM: Fortinet FortiProxy: Fortinet FortiOS:

Exploit Probability

EPSS
0.12%
Percentile
31.52%

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.