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Vulnerability record · CVE-2023-36947 · published 16 October 2023

CVE-2023-36947: Totolink x5000r firmware out-of-bounds write vulnerability

TTotolink · X5000r Firmware

TOTOLINK 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 in the function UploadCustomModule.

9.8 CVSS 3.1 Critical EPSS 0.82% · top 44.6% CWE-787 · Out-of-bounds writeCWE-121 · Stack-based buffer overflow
9.8CVSS 3.1 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

TOTOLINK 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 in the function UploadCustomModule.

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

Affected products

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

References

LinkTags
https://github.com/Archerber/bug_submit/blob/main/TOTOLINK/UploadCustomModule.md ExploitThird Party Advisory
https://github.com/Archerber/bug_submit/blob/main/TOTOLINK/UploadCustomModule.md ExploitThird Party Advisory

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Related vulnerabilities

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

9.8CVE-2025-70327Totolink x5000r firmware argument injection vulnerabilityTOTOLINK X5000R v9.1.0cu_2415_B20250515 contains an argument injection vulnerability in the setDiagnosisCfg handler of the /usr/sbin/lighttpd executa…EPSS 0.72%9.8CVE-2025-13184Totolink x5000r firmware incorrect authorization vulnerabilityUnauthenticated Telnet enablement via cstecgi.cgi (auth bypass) leading to unauthenticated root login with a blank password on factory/reset X5000R V…EPSS 11%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-2024-32353Totolink x5000r firmware command injection vulnerabilityTOTOLINK X5000R V9.1.0cu.2350_B20230313 was discovered to contain a command injection vulnerability via the 'port' parameter in the setSSServer funct…EPSS 2.1%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-2023-6612Totolink x5000r firmware os command injection vulnerabilityA vulnerability was found in Totolink X5000R 9.1.0cu.2300_B20230112. It has been rated as critical. This issue affects the function setDdnsCfg/setDyn…EPSS 31%

Source: NIST National Vulnerability Database (record CVE-2023-36947), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.