---
id: CVE-2025-12259
title: A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024
summary: >-
  A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected
  element is the function setScheduleCfg of the file /cgi-bin/cstecgi.cgi of the
  component POST Parameter Handler. This manipulation of the argument recHour
  caus…
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-121
vendor: totolink
product: a3300r_firmware
affected:
  - a3300r_firmware = 17.0.0cu.557_b20221024
published: '2025-10-27'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12259'
references:
  - url: >-
      https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setScheduleCfg.md
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.329930'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.329930'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.673726'
    label: cna@vuldb.com
  - url: 'https://www.totolink.net/'
    label: cna@vuldb.com
tags:
  - nvd
epss: 0.01024
epssPercentile: 0.62394
ingestedAt: '2026-10-08T11:31:27.626Z'
---

## Overview

A flaw has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. The affected element is the function setScheduleCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. This manipulation of the argument recHour causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been published and may be used.

## Affected

- `a3300r_firmware = 17.0.0cu.557_b20221024`

## Remediation

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