CVE-2025-53844

A out-of-bounds write vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11 allows attacker to execute unauthorized code or commands via specially crafted packets.

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2026-05-12

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• fortinet:fortios

References

• https://fortiguard.fortinet.com/psirt/FG-IR-26-123
• https://cert-portal.siemens.com/productcert/html/ssa-864900.html

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