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CVE-2026-84389

Quick assessment

Affected
Fortinet FortiSIEM
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 FortiSIEM 7.5.0 至 7.5.1 版本以及 7.4.1 至 7.4.2 版本中存在一个 URL 重定向到不受信任站点（即“开放重定向”）的漏洞。该漏洞可能允许攻击者通过 <在此处插入攻击向量> 执行未经授权的代码或命令。

CVSS 2.8 · Low

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
Fortinet FortiSIEM 7.5.0≤ 7.5.1 affected
7.4.1≤ 7.4.2 affected
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I. Basic Information for CVE-2026-84389

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A url redirection to untrusted site ('open redirect') vulnerability in Fortinet FortiSIEM 7.5.0 through 7.5.1, FortiSIEM 7.4.1 through 7.4.2 may allow attacker to execute unauthorized code or commands via <insert attack vector here>
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fortinet FortiSIEM 7.5.0 ~ 7.5.1 cpe:2.3:a:fortinet:fortisiem:7.5.1:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-84389

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-84389

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Vendor Advisories for CVE-2026-84389 (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-2026-84391 5.9 MEDIUM FortiAnalyzer 7.6.3-7.6.6 未初始化变量致拒绝服务
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-2026-84392 2.5 LOW FortiOS/FortiPAM空指针解引用漏洞

IV. Related Vulnerabilities

Same product: FortiSIEM
Same vendor: Fortinet
Same weakness: CWE-601

V. Comments for CVE-2026-84389

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