CVE-2026-84391: Denial of service in Fortinet FortiAnalyzer
CVE-2026-84391 is a medium severity vulnerability in Fortinet FortiAnalyzer versions 7.6.3 through 7.6.6 involving the use of an uninitialized variable. This flaw may allow an attacker with low privileges to cause a denial of service (DoS) condition. An official fix is available from the vendor to address this issue.
AI Analysis
Technical Summary
This vulnerability in Fortinet FortiAnalyzer (version 7.6.3) arises from the use of an uninitialized variable, which can be exploited by an attacker with network access and low privileges to cause a denial of service. The CVSS 3.1 base score is 5.9, reflecting a medium severity impact focused on availability disruption. The vendor has released an official fix to remediate the issue.
Potential Impact
Successful exploitation results in denial of service, impacting the availability of the FortiAnalyzer device. There is no confidentiality or integrity impact reported. The attack requires low privileges and no user interaction.
Mitigation Recommendations
An official fix is available from Fortinet for affected versions. Users should apply the vendor-provided patch to remediate this vulnerability. Since the product is not a cloud service, remediation depends on user action to update the affected FortiAnalyzer devices.
CVE-2026-84391: Denial of service in Fortinet FortiAnalyzer
Description
CVE-2026-84391 is a medium severity vulnerability in Fortinet FortiAnalyzer versions 7.6.3 through 7.6.6 involving the use of an uninitialized variable. This flaw may allow an attacker with low privileges to cause a denial of service (DoS) condition. An official fix is available from the vendor to address this issue.
CVSS v3.1
Score 5.9medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Fortinet FortiAnalyzer (version 7.6.3) arises from the use of an uninitialized variable, which can be exploited by an attacker with network access and low privileges to cause a denial of service. The CVSS 3.1 base score is 5.9, reflecting a medium severity impact focused on availability disruption. The vendor has released an official fix to remediate the issue.
Potential Impact
Successful exploitation results in denial of service, impacting the availability of the FortiAnalyzer device. There is no confidentiality or integrity impact reported. The attack requires low privileges and no user interaction.
Mitigation Recommendations
An official fix is available from Fortinet for affected versions. Users should apply the vendor-provided patch to remediate this vulnerability. Since the product is not a cloud service, remediation depends on user action to update the affected FortiAnalyzer devices.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- fortinet
- Date Reserved
- 2026-09-01T16:36:11.927Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
Threat ID: 6aa03d6bacd9273b49f0b43e
Added to database: 09/08/2026, 16:52:59 UTC
Last enriched: 09/08/2026, 17:07:53 UTC
Last updated: 09/09/2026, 02:26:08 UTC
Views: 11
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