← Vulnerability feed

Vulnerability record · CVE-2023-7221 · published 9 January 2024

CVE-2023-7221: Totolink t6 firmware classic buffer overflow vulnerability

TTotolink · T6 Firmware

A vulnerability was found in Totolink T6 4.1.9cu.5241_B20210923. It has been classified as critical. This affects the function main of the file /cgi-bin/cstecgi.cgi?action=login of the component HTTP POST Request Handler. The manipulation of the argument v41 leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-249855. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.5% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score, v2 10.0
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was found in Totolink T6 4.1.9cu.5241_B20210923. It has been classified as critical. This affects the function main of the file /cgi-bin/cstecgi.cgi?action=login of the component HTTP POST Request Handler. The manipulation of the argument v41 leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-249855. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

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

Affected products

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

References

LinkTags
https://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/README.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.249855 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.249855 Third Party Advisory
https://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/README.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.249855 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.249855 Third Party Advisory

Track CVE-2023-7221 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

9.8CVE-2022-38828Totolink t6 firmware os command injection vulnerabilityTOTOLINK T6 V4.1.5cu.709_B20210518 is vulnerable to command injection via cstecgi.cgiEPSS 20%9.8CVE-2022-38823Totolink t6 firmware hard-coded credentials vulnerabilityIn TOTOLINK T6 V4.1.5cu.709_B20210518, there is a hard coded password for root in /etc/shadow.sample.EPSS 1.1%9.8CVE-2022-38826Totolink t6 firmware os command injection vulnerabilityIn TOTOLINK T6 V4.1.5cu.709_B20210518, there is an execute arbitrary command in cstecgi.cgi.EPSS 1.3%9.8CVE-2022-38827Totolink t6 firmware classic buffer overflow vulnerabilityTOTOLINK T6 V4.1.5cu.709_B20210518 is vulnerable to Buffer Overflow via cstecgi.cgiEPSS 12%9.8CVE-2022-25084Totolink t6 firmware os command injection vulnerabilityTOTOLink T6 V5.9c.4085_B20190428 was discovered to contain a command injection vulnerability in the "Main" function. This vulnerability allows attack…EPSS 25%9.8CVE-2022-25130Totolink t6 firmware command injection vulnerabilityA command injection vulnerability in the function updateWifiInfo of TOTOLINK Technology routers T6 V3_Firmware T6_V3_V4.1.5cu.748_B20211015 and T10 V…EPSS 2.2%9.8CVE-2022-25131Totolink t6 firmware command injection vulnerabilityA command injection vulnerability in the function recvSlaveCloudCheckStatus of TOTOLINK Technology routers T6 V3_Firmware T6_V3_V4.1.5cu.748_B2021101…EPSS 2.2%9.8CVE-2022-25132Totolink t6 firmware command injection vulnerabilityA command injection vulnerability in the function meshSlaveDlfw of TOTOLINK Technology router T6 V3_Firmware T6_V3_V4.1.5cu.748_B20211015 allows atta…EPSS 2.9%

Source: NIST National Vulnerability Database (record CVE-2023-7221), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.