---
id: CVE-2026-15511
title: A vulnerability was determined in Comfast CF-WR631AX V3 up to 2.7.0.8
summary: >-
  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 argum…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-77
  - CWE-78
published: '2026-07-12'
updated: '2026-07-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15511'
references:
  - url: >-
      https://github.com/luminarydawn/cve/tree/main/Command%20Injection%20in%20Comfast%20CF-WR631AX%20V3%20%E2%80%94%20WiFi%20Portal%20Image%20Upload%20(CWE-78)
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-15511'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/846719'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/377840'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/377840/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-07-12T23:22:21.221Z'
epss: 0.04731
epssPercentile: 0.91504
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.