CyberCVE

CVE-2025-53843

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 at

Severity
Medium 6.9
CVSS 3.1
Exploited
Not listed
EPSS
0.006
45.0th percentile
Discovered by
Not disclosed
Published
Nov 18, 2025
Assigned by fortinet

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

Weakness: CWE-121

Affected products

Vendor Product Category Matched by
Fortinet FortiOS Firewall / NGFW cna-assigner
Vendor-reported affected versions (2)
  • Fortinet · FortiOS
  • Siemens · RUGGEDCOM APE1808

Vendor remediation

Fortinet remediated this issue in FortiSASE version 25.3.c and hence customers do not need to perform any action. Fortinet remediated this issue in FortiEdgeCloud version 25.3 and hence customers do not need to perform any action. Upgrade to FortiSwitchManager version 7.2.7 or above Upgrade to FortiSwitchManager version 7.0.6 or above Upgrade to upcoming FortiOS version 8.0.0 or above Upgrade to FortiOS version 7.6.4 or above Upgrade to FortiOS version 7.4.9 or above

References