CVE-2026-15511
Received Received - Intake

Command Injection in Comfast CF-WR631AX Router

Vulnerability report for CVE-2026-15511, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-07-12

Last updated on: 2026-07-12

Assigner: VulDB

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.

CVSS Scores

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Meta Information

Published
2026-07-12
Last Modified
2026-07-12
Generated
2026-07-13
AI Q&A
2026-07-13
EPSS Evaluated
N/A
NVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
comfast cf-wr631ax to 2.7.0.8 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability exists in the Comfast CF-WR631AX V3 router firmware up to version 2.7.0.8. It affects the function system_wl_upload_pic_file within the FastCGI Backend component. The issue arises from improper handling of the filename argument, which allows an attacker to perform OS command injection. This means an attacker can remotely execute arbitrary operating system commands on the affected device.

Impact Analysis

The vulnerability allows remote attackers to execute arbitrary operating system commands on the affected device without any authentication. This can lead to full compromise of the device, including unauthorized access, control over the device, disruption of services, data theft, or using the device as a foothold for further attacks within a network.

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