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CVE-2026-59838

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是美国Fortinet公司的一套安全信息和事件管理系统。该系统基础设施、应用程序和虚拟机等资产的安全事件管理。 Fortinet FortiSIEM存在跨站脚本漏洞，该漏洞源于对Web页面中与脚本相关的HTML标签中和不当，可能导致攻击者执行未经授权的代码或命令。以下版本受到影响：6.4.0版本至7.2.6及之前版本、7.3.0版本至7.3.4及之前版本、7.4.0版本。

CVSS 5.3 · Medium EPSS 0.24% · P14

Affected Version Matrix 11

VendorProduct Version RangeStatus
Fortinet FortiSIEM 7.4.0 affected
7.3.0≤ 7.3.4 affected
7.2.0≤ 7.2.6 affected
7.1.0≤ 7.1.9 affected
7.0.0≤ 7.0.4 affected
6.7.0≤ 6.7.10 affected
6.6.0≤ 6.6.5 affected
6.5.0≤ 6.5.3 affected
… +3 more rows
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I. Basic Information for CVE-2026-59838

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A improper neutralization of script-related html tags in a web page (basic xss) vulnerability in Fortinet FortiSIEM 7.4.0, FortiSIEM 7.3.0 through 7.3.4, FortiSIEM 7.2.0 through 7.2.6, FortiSIEM 7.1 all versions, FortiSIEM 7.0 all versions, FortiSIEM 6.7 all versions, FortiSIEM 6.6 all versions, FortiSIEM 6.5 all versions, FortiSIEM 6.4 all versions 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:L/PR:H/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet FortiSIEM 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet fortisiem是美国Fortinet公司的一套安全信息和事件管理系统。该系统基础设施、应用程序和虚拟机等资产的安全事件管理。 Fortinet FortiSIEM存在跨站脚本漏洞，该漏洞源于对Web页面中与脚本相关的HTML标签中和不当，可能导致攻击者执行未经授权的代码或命令。以下版本受到影响：6.4.0版本至7.2.6及之前版本、7.3.0版本至7.3.4及之前版本、7.4.0版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Fortinet FortiSIEM 7.4.0 cpe:2.3:a:fortinet:fortisiem:7.4.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-59838

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III. Intelligence Information for CVE-2026-59838

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Vendor Advisories for CVE-2026-59838 (1)

IV. Related Vulnerabilities

Same product: FortiSIEM
Same vendor: Fortinet
Same weakness: CWE-80

V. Comments for CVE-2026-59838

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