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CVE-2026-70465

Quick assessment

Affected
Fortinet FortiClientWindows
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 forticlientwindows是美国Fortinet公司的一款终端安全反病毒产品。 Fortinet forticlientwindows 7.4.0版本至7.4.3版本和7.2.0版本至7.2.11版本存在缓冲区错误漏洞，该漏洞源于未检查输入大小的缓冲区复制，可能导致未经身份验证的攻击者通过修改或伪造DNS响应及恶意数据包执行任意代码。

CVSS 7.3 · High EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
Fortinet FortiClientWindows 7.4.0≤ 7.4.3 affected
7.2.0≤ 7.2.11 affected
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I. Basic Information for CVE-2026-70465

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.2.0 through 7.2.11 may allow an unauthenticated attacker in a position to alter or craft DNS responses to the targeted host to execute arbitrary code via malicious packets.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet forticlientwindows 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet forticlientwindows是美国Fortinet公司的一款终端安全反病毒产品。 Fortinet forticlientwindows 7.4.0版本至7.4.3版本和7.2.0版本至7.2.11版本存在缓冲区错误漏洞，该漏洞源于未检查输入大小的缓冲区复制，可能导致未经身份验证的攻击者通过修改或伪造DNS响应及恶意数据包执行任意代码。
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 FortiClientWindows 7.4.0 ~ 7.4.3 cpe:2.3:a:fortinet:forticlientwindows:7.4.3:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-70465

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III. Intelligence Information for CVE-2026-70465

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Vendor Advisories for CVE-2026-70465 (1)

Same Patch Batch · Fortinet · 2026-08-12 · 7 CVEs total

CVE-2026-26035 8.8 HIGH Fortinet FortiWeb 授权问题漏洞
CVE-2026-70468 7.3 HIGH Fortinet fortimanager 授权问题漏洞
CVE-2026-71407 5.1 MEDIUM Fortinet FortiOS 缓冲区错误漏洞
CVE-2026-71408 5.0 MEDIUM Fortinet FortiOS 资源管理错误漏洞
CVE-2026-70466 4.8 MEDIUM Fortinet FortiWeb 输入验证错误漏洞
CVE-2026-70467 3.4 LOW Fortinet fortisiem 服务端请求伪造漏洞

IV. Related Vulnerabilities

Same product: FortiClientWindows
Same vendor: Fortinet
Same weakness: CWE-120

V. Comments for CVE-2026-70465

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