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Vulnerability record · CVE-2023-6906 · published 18 December 2023

CVE-2023-6906: Totolink a7100ru firmware classic buffer overflow vulnerability

TTotolink · A7100ru Firmware

A vulnerability, which was classified as critical, was found in Totolink A7100RU 7.4cu.2313_B20191024. Affected is the function main of the file /cgi-bin/cstecgi.cgi?action=login of the component HTTP POST Request Handler. The manipulation of the argument flag with the input ie8 leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-248268. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

9.8 CVSS 3.1 Critical EPSS 1.8% · top 21.7% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score, v2 10.0
1.8%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, which was classified as critical, was found in Totolink A7100RU 7.4cu.2313_B20191024. Affected is the function main of the file /cgi-bin/cstecgi.cgi?action=login of the component HTTP POST Request Handler. The manipulation of the argument flag with the input ie8 leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-248268. 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/unpWn4bL3/iot-security/blob/main/1.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.248268 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.248268 Third Party Advisory
https://github.com/unpWn4bL3/iot-security/blob/main/1.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.248268 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.248268 Third Party Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2023-6906), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.