CVE-2025-53844: Execute unauthorized code or commands in Fortinet FortiOS
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.
AI Analysis
Technical Summary
This vulnerability in Fortinet FortiOS is caused by an out-of-bounds write condition that can be triggered via specially crafted packets. It affects multiple FortiOS versions starting from 7.2.0 up to 7.6.3. Successful exploitation allows an attacker with low privileges to execute unauthorized code or commands on the affected device, potentially leading to full compromise. The vendor has released an official fix to remediate this vulnerability.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized code or command execution on FortiOS devices, impacting confidentiality, integrity, and availability. The CVSS 3.1 base score of 8.3 reflects high severity with network attack vector, low attack complexity, and no user interaction required. This could allow attackers to gain control over affected systems.
Mitigation Recommendations
An official patch is available from Fortinet to remediate this vulnerability. Users should apply the vendor-provided updates to affected FortiOS versions as soon as possible to prevent exploitation.
CVE-2025-53844: Execute unauthorized code or commands in Fortinet FortiOS
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.
CVSS v3.1
Score 8.3high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Fortinet FortiOS is caused by an out-of-bounds write condition that can be triggered via specially crafted packets. It affects multiple FortiOS versions starting from 7.2.0 up to 7.6.3. Successful exploitation allows an attacker with low privileges to execute unauthorized code or commands on the affected device, potentially leading to full compromise. The vendor has released an official fix to remediate this vulnerability.
Potential Impact
Exploitation of this vulnerability can lead to unauthorized code or command execution on FortiOS devices, impacting confidentiality, integrity, and availability. The CVSS 3.1 base score of 8.3 reflects high severity with network attack vector, low attack complexity, and no user interaction required. This could allow attackers to gain control over affected systems.
Mitigation Recommendations
An official patch is available from Fortinet to remediate this vulnerability. Users should apply the vendor-provided updates to affected FortiOS versions as soon as possible to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- fortinet
- Date Reserved
- 2025-07-10T08:53:33.015Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 6a03652ecbff5d861008c149
Added to database: 05/12/2026, 17:36:46 UTC
Last enriched: 07/16/2026, 09:35:55 UTC
Last updated: 07/31/2026, 19:22:55 UTC
Views: 130
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.