CVE-2025-53843
Modified Modified - Updated After Analysis
BaseFortify

Publication date: 2025-11-18

Last updated on: 2026-06-09

Assigner: Fortinet, Inc.

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
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Meta Information
Published
2025-11-18
Last Modified
2026-06-09
Generated
2026-06-16
AI Q&A
2025-11-18
EPSS Evaluated
2026-06-15
NVD
CVE-2025-53843
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
fortinet fortios From 6.4.0 (inc) to 7.4.9 (exc)
fortinet fortios From 7.6.0 (inc) to 7.6.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
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Executive Summary

This vulnerability is a stack-based buffer overflow in Fortinet FortiOS versions 6.4 through 7.6.3. It allows an attacker to execute unauthorized code or commands by sending specially crafted packets to the affected system.

Impact Analysis

The vulnerability can allow an attacker to execute unauthorized code or commands on the affected FortiOS device, potentially leading to full compromise of the system, data loss, or disruption of services.

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