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

CVSS 9.8 · Critical EPSS 2.69% · P84

Affected Version Matrix 9

VendorProductVersion RangeStatus
ComfastCF-WR631AX V32.7.0.0affected
2.7.0.1affected
2.7.0.2affected
2.7.0.3affected
2.7.0.4affected
2.7.0.5affected
2.7.0.6affected
2.7.0.7affected
… +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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
ComfastCF-WR631AX V3 2.7.0.0 cpe:2.3:a:comfast:cf-wr631ax_v3:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-15511

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 11730 chars
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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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