---
id: CVE-2025-9780
title: A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423
summary: >-
  A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this
  issue is the function sub_419BE0 of the file /boafrm/formIpQoS. This
  manipulation of the argument mac causes buffer overflow. The attack can be
  initiated remo…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-119
  - CWE-120
vendor: totolink
product: a702r_firmware
affected:
  - a702r_firmware = 4.0.0-b20211108.1423
published: '2025-09-01'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-9780'
references:
  - url: >-
      https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formIpQoS/formIpQoS.md
    label: cna@vuldb.com
  - url: >-
      https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formIpQoS/formIpQoS.md#poc
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.322082'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.322082'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.640988'
    label: cna@vuldb.com
  - url: 'https://www.totolink.net/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.00664
epssPercentile: 0.49606
ingestedAt: '2026-09-26T00:22:39.904Z'
---

## Overview

A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this issue is the function sub_419BE0 of the file /boafrm/formIpQoS. This manipulation of the argument mac causes buffer overflow. The attack can be initiated remotely. The exploit has been published and may be used.

## Affected

- `a702r_firmware = 4.0.0-b20211108.1423`

## Remediation

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