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Vulnerability record · CVE-2025-63462 · published 31 October 2025

CVE-2025-63462: Totolink a7000r firmware stack-based buffer overflow vulnerability

TTotolink · A7000r Firmware

Totolink A7000R v9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the wifiOff parameter in the sub_421A04 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

7.5 CVSS 3.1 High EPSS 0.39% · top 70.1% CWE-121 · Stack-based buffer overflow
7.5CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Totolink A7000R v9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the wifiOff parameter in the sub_421A04 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/A7000/3/1.md ExploitThird Party Advisory
https://github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/A7000/3/1.md ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-51452Totolink a7000r firmware authentication bypass via alternate path vulnerabilityIn TOTOLINK A7000R firmware 9.1.0u.6115_B20201022, an attacker can bypass login by sending a specific request through formLoginAuth.htm.EPSS 0.38%9.8CVE-2024-28639Totolink x5000r firmware classic buffer overflow vulnerabilityBuffer Overflow vulnerability in TOTOLink X5000R V9.1.0u.6118-B20201102 and A7000R V9.1.0u.6115-B20201022, allow remote attackers to execute arbitrar…EPSS 1.2%9.8CVE-2023-49417Totolink a7000r firmware out-of-bounds write vulnerabilityTOTOLink A7000R V9.1.0u.6115_B20201022 has a stack overflow vulnerability via setOpModeCfg.EPSS 0.87%9.8CVE-2023-49418Totolink a7000r firmware out-of-bounds write vulnerabilityTOTOLink A7000R V9.1.0u.6115_B20201022has a stack overflow vulnerability via setIpPortFilterRules.EPSS 0.87%9.8CVE-2023-45984Totolink x5000r firmware out-of-bounds write vulnerabilityTOTOLINK X5000R V9.1.0u.6118_B20201102 and TOTOLINK A7000R V9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the lang parameter i…EPSS 0.70%9.8CVE-2023-36950Totolink x5000r firmware out-of-bounds write vulnerabilityTOTOLINK X5000R V9.1.0u.6118_B20201102 and TOTOLINK A7000R V9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the http_host parame…EPSS 0.82%9.8CVE-2023-36947Totolink x5000r firmware out-of-bounds write vulnerabilityTOTOLINK X5000R V9.1.0u.6118_B20201102 and TOTOLINK A7000R V9.1.0u.6115_B20201022 was discovered to contain a stack overflow via the File parameter i…EPSS 0.82%9.8CVE-2022-32993Totolink a7000r firmware vulnerabilityTOTOLINK A7000R V4.1cu.4134 was discovered to contain an access control issue via /cgi-bin/ExportSettings.sh.EPSS 0.94%

Source: NIST National Vulnerability Database (record CVE-2025-63462), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.