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CVE-2026-15511— Comfast CF-WR631AX V3 FastCGI Backend webmgnt system_wl_upload_pic_file os command injection

Quick assessment

Affected
Comfast CF-WR631AX V3
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-wr631ax v3是中国Comfast公司的一款路由器设备。 Comfast cf-wr631ax v3 2.7.0.8及之前版本存在命令注入漏洞，该漏洞源于组件FastCGI Backend中文件/usr/bin/webmgnt的函数system_wl_upload_pic_file对参数filename操作不当，导致os命令注入，可能允许攻击者远程执行命令。

CVSS 9.8 · Critical EPSS 4.73% · P91

Affected Version Matrix 9

VendorProduct Version RangeStatus
Comfast CF-WR631AX V3 2.7.0.0 affected
2.7.0.1 affected
2.7.0.2 affected
2.7.0.3 affected
2.7.0.4 affected
2.7.0.5 affected
2.7.0.6 affected
2.7.0.7 affected
… +1 more rows
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I. Basic Information for CVE-2026-15511

Vulnerability Information
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Vulnerability Title
Comfast CF-WR631AX V3 FastCGI Backend webmgnt system_wl_upload_pic_file os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in Comfast CF-WR631AX V3 up to 2.7.0.8. Affected by this vulnerability is the function system_wl_upload_pic_file of the file /usr/bin/webmgnt of the component FastCGI Backend. This manipulation of the argument filename causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Comfast cf-wr631ax v3 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Comfast cf-wr631ax v3是中国Comfast公司的一款路由器设备。 Comfast cf-wr631ax v3 2.7.0.8及之前版本存在命令注入漏洞，该漏洞源于组件FastCGI Backend中文件/usr/bin/webmgnt的函数system_wl_upload_pic_file对参数filename操作不当，导致os命令注入，可能允许攻击者远程执行命令。
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-WR631AX V3 2.7.0.0 cpe:2.3:a:comfast:cf-wr631ax_v3:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-15511

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 11730 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-2026-15511

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Proof of Concept for CVE-2026-15511 (1)

IV. Related Vulnerabilities

Same product: CF-WR631AX V3
Same vendor: Comfast
Same weakness: CWE-78

V. Comments for CVE-2026-15511

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