CVE-2023-6906

Name: CVE-2023-6906
Creator: NVD / NIST
Published: 2023-12-18T04:15:51.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.85%

Last modified Jun 17, 2026

CVE-2023-6906 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.85% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.85%

76.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	A7100ru Firmware	7.4cu.2313_b20191024

References

https://github.com/unpWn4bL3/iot-security/blob/main/1.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.248268Permissions Required, Third Party Advisory
https://vuldb.com/?id.248268Third Party Advisory
https://github.com/unpWn4bL3/iot-security/blob/main/1.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.248268Permissions Required, Third Party Advisory
https://vuldb.com/?id.248268Third Party Advisory

Timeline

Published: Dec 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-6906?

How severe is CVE-2023-6906?

CVE-2023-6906 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.85% probability of exploitation in the next 30 days.

How do I fix CVE-2023-6906?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-6906?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST