Medium severity · published Sep 8, 2026
CVE-2026-84391
A use of uninitialized variable vulnerability in Fortinet FortiAnalyzer 7.6.3 through 7.6.6 may allow attacker to denial of service via <insert attack vector here>
6.5
CVSS
0.4%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiAnalyzer · Fortinet
7.6.3 through 7.6.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84391
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84391
fortiguard.fortinet.com
https://fortiguard.fortinet.com/psirt/FG-IR-26-172
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