CVE-2025-53844
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Fortinet Fortios
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- fortinet fortios7.2.12, 7.4.9, 7.6.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fortinet fortios | 7.2.0 ≤ v < 7.2.12, 7.4.0 ≤ v < 7.4.9, 7.6.0 ≤ v < 7.6.4 | 7.2.12, 7.4.9, 7.6.4 |
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