CVE-2025-53843

HighCVSS 7.5/10Last modified Oct 18, 2026

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

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-121

Affected software

Vendor	Product	Versions
Fortinet	FortiOS	>= 7.6.0, <= 7.6.3; >= 7.4.0, <= 7.4.8; >= 7.2.0, <= 7.2.12; >= 7.0.0, <= 7.0.18; >= 6.4.0, <= 6.4.16
Siemens	RUGGEDCOM APE1808	< *

References

Timeline

Published: Nov 18, 2025
Last modified: Oct 18, 2026
NVD status: Modified

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