CVE-2025-53844

⚠️ high

Summary

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 Score

8.8

High

EPSS Score

0.0

Exploit Probability

Published Date

2026-05-12

First Seen: 2026-05-17

📊 Relative Risk Intelligence

This CVE is High Risk - more severe than 81.1% of all 327,306 vulnerabilities in our database.

#61,876

Top 25% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: May 12, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-06-09

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-787

📦 Affected Products 3

Vendor	Product	Status	Affected Versions
fortinet	fortios	Affected	> 7.2.0 < 7.2.12
fortinet	fortios	Affected	> 7.4.0 < 7.4.9
fortinet	fortios	Affected	> 7.6.0 < 7.6.4

🔗 References 2

https://fortiguard.fortinet.com/psirt/FG-IR-26-123

Vendor Advisory

https://cert-portal.siemens.com/productcert/html/ssa...

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2025-67862	🔶 medium	6.7	0.0	An Internal Asset Exposed to Unsafe Debug Access Level or State vulnerability [CWE-1244] vulnerability in Fortinet Forti...	2026-06-09
CVE-2025-53847	🔶 medium	6.5	0.0	A missing authentication for critical function vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 thro...	2026-04-14
CVE-2025-55018	🔶 medium	5.8	0.1	An inconsistent interpretation of http requests ('http request smuggling') vulnerability in Fortinet FortiOS 7.6.0, Fort...	2026-02-10
CVE-2025-64157	🔶 medium	6.7	0.0	A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 throug...	2026-02-10
CVE-2025-68686	🔶 medium	5.9	0.0	An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] vulnerability in Fortinet FortiOS ...	2026-02-10
CVE-2026-22153	⚠️ high	8.1	0.1	An Authentication Bypass by Primary Weakness vulnerability [CWE-305] vulnerability in Fortinet FortiOS 7.6.0 through 7.6...	2026-02-10

These CVEs affect the same products