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CVE-2025-53843

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CVE-2025-53843

Published: Nov 18, 2025

Modified: Feb 26, 2026

PUBLISHED

CVSS v3.1

6.9

MEDIUM

Description

A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions allows attacker to execute unauthorized code or commands via specially crafted packets

VendorProductVersions

Fortinet

FortiOS

affected
7.6.0 - <= 7.6.3
affected
7.4.0 - <= 7.4.8
affected
7.2.0 - <= 7.2.12
affected
7.0.0 - <= 7.0.18
affected
6.4.0 - <= 6.4.16

Weaknesses (CWE)

CWE-121

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

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