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CVE-2026-84391

Quick assessment

Affected
Fortinet FortiAnalyzer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fortinet FortiAnalyzer 7.6.3 至 7.6.6 版本中存在一个未初始化变量使用漏洞，该漏洞可能允许攻击者通过<在此处插入攻击向量>导致服务拒绝（DoS）。

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
Fortinet FortiAnalyzer 7.6.3≤ 7.6.6 affected
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I. Basic Information for CVE-2026-84391

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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>
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用未经初始化的变量
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fortinet FortiAnalyzer 7.6.3 ~ 7.6.6 cpe:2.3:o:fortinet:fortianalyzer:7.6.6:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-84391

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-84391

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Vendor Advisories for CVE-2026-84391 (1)

Same Patch Batch · Fortinet · 2026-09-08 · 9 CVEs total

CVE-2026-26084 8.9 HIGH FortiSandbox 4.4.8/5.0.5 访问控制缺陷
CVE-2026-84393 7.3 HIGH FortiOS 7.6.1-7.6.6证书主机不匹配漏洞
CVE-2026-84387 6.7 MEDIUM FortiSandbox 5.2.0 等版本命令注入漏洞
CVE-2026-84385 4.9 MEDIUM FortiSOAR 7.3-7.6 权限提升漏洞
CVE-2026-22575 4.7 MEDIUM FortiManager 7.x 访问控制缺陷
CVE-2026-84386 4.7 MEDIUM FortiClient Windows 7.4.0-7.4.7 未验证所有权
CVE-2026-84389 2.8 LOW FortiSIEM 7.4/7.5 开放重定向漏洞
CVE-2026-84392 2.5 LOW FortiOS/FortiPAM空指针解引用漏洞

IV. Related Vulnerabilities

Same product: FortiAnalyzer
Same vendor: Fortinet
Same weakness: CWE-457

V. Comments for CVE-2026-84391

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