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CVE-2026-59836

Quick assessment

Affected
Fortinet FortiClientEMS
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fortinet FortiClientEms是美国Fortinet公司的一个集中式中央管理系統。 Fortinet FortiClientEMS存在加密问题漏洞，该漏洞源于证书验证不当，可能导致攻击者信息泄露。以下版本受到影响：7.4.3至7.4.5版本、7.4.0至7.4.1版本、7.2.0至7.2.10版本和7.2.12至7.2.14版本。

CVSS 6.7 · High EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 4

VendorProduct Version RangeStatus
Fortinet FortiClientEMS 7.4.3≤ 7.4.5 affected
7.4.0≤ 7.4.1 affected
7.2.12≤ 7.2.14 affected
7.2.0≤ 7.2.10 affected
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I. Basic Information for CVE-2026-59836

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A improper certificate validation vulnerability in Fortinet FortiClientEMS 7.4.3 through 7.4.5, FortiClientEMS 7.4.0 through 7.4.1, FortiClientEMS 7.2 all versions may allow attacker to information disclosure 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:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet FortiClientEMS 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet FortiClientEms是美国Fortinet公司的一个集中式中央管理系統。 Fortinet FortiClientEMS存在加密问题漏洞，该漏洞源于证书验证不当，可能导致攻击者信息泄露。以下版本受到影响：7.4.3至7.4.5版本、7.4.0至7.4.1版本、7.2.0至7.2.10版本和7.2.12至7.2.14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 FortiClientEMS 7.4.3 ~ 7.4.5 cpe:2.3:a:fortinet:forticlientems:7.4.5:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-59836

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
default-local-qwen3.6 · 12245 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-59836

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Vendor Advisories for CVE-2026-59836 (1)

Same Patch Batch · Fortinet · 2026-07-14 · 11 CVEs total

CVE-2026-59835 7.7 HIGH Fortinet FortiSandbox 权限许可和访问控制问题漏洞
CVE-2025-53379 7.0 HIGH Fortinet FortiAuthenticator 缓冲区错误漏洞
CVE-2026-59841 6.9 MEDIUM Fortinet FortiSIEMWindowsAgent 授权问题漏洞
CVE-2026-23573 6.1 MEDIUM Fortinet FortiOS 跨站脚本漏洞
CVE-2026-59837 5.9 MEDIUM Fortinet FortiOS 缓冲区错误漏洞
CVE-2026-59839 5.0 MEDIUM Fortinet FortiOS 路径遍历漏洞
CVE-2026-59840 4.1 MEDIUM Fortinet FortiOS 缓冲区错误漏洞
CVE-2025-43892 4.1 MEDIUM Fortinet FortiOS 缓冲区错误漏洞
CVE-2025-62675 3.4 LOW Fortinet FortiOS 输入验证错误漏洞
CVE-2025-62826 3.1 LOW Fortinet FortiOS 输入验证错误漏洞

IV. Related Vulnerabilities

Same product: FortiClientEMS
Same vendor: Fortinet
Same weakness: CWE-295

V. Comments for CVE-2026-59836

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