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CVE-2025-53843

Quick assessment

Affected
Fortinet FortiOS
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 FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS存在安全漏洞，该漏洞源于基于栈的缓冲区溢出，可能导致执行未经授权的代码或命令。以下版本受到影响：7.6.0版本至7.6.3版本、7.4.0版本至7.4.8版本、7.2所有版本、7.0所有版本和6.4所有版本。

CVSS 6.9 · High EPSS 0.58% · P46

Affected Version Matrix 5

VendorProduct Version RangeStatus
Fortinet FortiOS 7.6.0≤ 7.6.3 affected
7.4.0≤ 7.4.8 affected
7.2.0≤ 7.2.12 affected
7.0.0≤ 7.0.18 affected
6.4.0≤ 6.4.16 affected
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I. Basic Information for CVE-2025-53843

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions allows attacker to execute unauthorized code or commands via specially crafted packets
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Fortinet FortiOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fortinet FortiOS是美国飞塔（Fortinet）公司的一套专用于FortiGate网络安全平台上的安全操作系统。该系统为用户提供防火墙、防病毒、IPSec/SSLVPN、Web内容过滤和反垃圾邮件等多种安全功能。 Fortinet FortiOS存在安全漏洞，该漏洞源于基于栈的缓冲区溢出，可能导致执行未经授权的代码或命令。以下版本受到影响：7.6.0版本至7.6.3版本、7.4.0版本至7.4.8版本、7.2所有版本、7.0所有版本和6.4所有版本。
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 FortiOS 7.6.0 ~ 7.6.3 cpe:2.3:o:fortinet:fortios:7.6.3:*:*:*:*:*:*:*

II. Public POCs for CVE-2025-53843

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III. Intelligence Information for CVE-2025-53843

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Vendor Advisories for CVE-2025-53843 (1)

Same Patch Batch · Fortinet · 2025-11-18 · 16 CVEs total

CVE-2025-58692 7.7 HIGH Fortinet FortiVoice SQL注入漏洞
CVE-2025-47761 7.1 HIGH Fortinet FortiClientWindows 安全漏洞
CVE-2025-46373 7.1 HIGH Fortinet FortiClientWindows 安全漏洞
CVE-2025-58413 6.9 MEDIUM Fortinet FortiOS 安全漏洞
CVE-2025-58034 6.7 MEDIUM Fortinet FortiWeb 安全漏洞
CVE-2025-46776 6.3 MEDIUM Fortinet FortiExtender 安全漏洞
CVE-2025-48839 6.3 MEDIUM Fortinet FortiADC 缓冲区错误漏洞
CVE-2025-46775 5.2 MEDIUM Fortinet FortiExtender 安全漏洞
CVE-2025-46215 5.0 MEDIUM Fortinet FortiSandbox 安全漏洞
CVE-2025-54660 4.9 MEDIUM Fortinet FortiClientWindows 安全漏洞
CVE-2025-59669 4.8 MEDIUM Fortinet FortiWeb 信任管理问题漏洞
CVE-2025-54972 3.9 LOW Fortinet FortiMail 注入漏洞
CVE-2025-54971 3.9 LOW Fortinet FortiADC 信息泄露漏洞
CVE-2025-61713 3.8 LOW Fortinet FortiPAM 安全漏洞
CVE-2025-54821 1.8 LOW Fortinet多款产品 安全漏洞

IV. Related Vulnerabilities

Same product: FortiOS
Same vendor: Fortinet
Same weakness: CWE-121

V. Comments for CVE-2025-53843

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