CVE-2025-53843

HIGH

Fortinet FortiOS <7.6.3 - Buffer Overflow

Title source: llm
STIX 2.1

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

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0001
EPSS Percentile 0.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-121
Status published
Products (1)
fortinet/fortios 6.4.0 - 7.4.9
Published Nov 18, 2025
Tracked Since Feb 18, 2026