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CVE-2026-77004— Comfast CF-N1-S mbox-config sprintf command injection

Quick assessment

Affected
Comfast CF-N1-S
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.

Comfast CF-N1-S是中国Comfast公司的一款无线网络连接设备。 Comfast CF-N1-S 2.6.0.1版本存在安全漏洞，该漏洞源于文件/cgi-bin/mbox-config?method=SET&section=ptest_sn中sprintf函数对参数sn的操作不当，可能导致远程命令执行。

CVSS 7.4 · High EPSS 1.77% · P78

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Comfast CF-N1-S 2.6.0.1 affected
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I. Basic Information for CVE-2026-77004

Vulnerability Information
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Vulnerability Title
Comfast CF-N1-S mbox-config sprintf command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Comfast CF-N1-S 2.6.0.1. This impacts the function sprintf of the file /cgi-bin/mbox-config?method=SET&section=ptest_sn. Executing a manipulation of the argument sn can lead to command injection. The attack can be launched remotely. The exploit has been published and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Comfast CF-N1-S 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Comfast CF-N1-S是中国Comfast公司的一款无线网络连接设备。 Comfast CF-N1-S 2.6.0.1版本存在安全漏洞，该漏洞源于文件/cgi-bin/mbox-config?method=SET&section=ptest_sn中sprintf函数对参数sn的操作不当，可能导致远程命令执行。
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
Comfast CF-N1-S 2.6.0.1 cpe:2.3:a:comfast:cf-n1-s:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-77004

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7692 chars
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In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2026-77004

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Vendor Advisories for CVE-2026-77004 (2)

Proof of Concept for CVE-2026-77004 (1)

News Coverage for CVE-2026-77004 (1)

Same Patch Batch · Comfast · 2026-08-20 · 3 CVEs total

CVE-2026-77022 9.9 CRITICAL Comfast CF-N1-S SSID Configuration mbox-config sub_44B438 stack-based overflow
CVE-2026-77148 9.9 CRITICAL Comfast CF-N1-S Web Management mbox-config sub_44B50C stack-based overflow

IV. Related Vulnerabilities

Same product: CF-N1-S
Same vendor: Comfast
Same weakness: CWE-77

V. Comments for CVE-2026-77004

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