CVE-2023-7221

Name: CVE-2023-7221
Creator: NVD / NIST
Published: 2024-01-09T14:15:46.2+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.52%

Last modified Jun 17, 2026

CVE-2023-7221 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability was found in Totolink T6 4.1.9cu.5241_B20210923. It has been classified as critical. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

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.

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

1.52%

71.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Totolink	T6 Firmware	4.1.9cu.5241_b20210923

References

https://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/README.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.249855Permissions Required, Third Party Advisory
https://vuldb.com/?id.249855Third Party Advisory
https://github.com/jylsec/vuldb/blob/main/TOTOLINK/T6/1/README.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.249855Permissions Required, Third Party Advisory
https://vuldb.com/?id.249855Third Party Advisory

Timeline

Published: Jan 9, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-7221?

How severe is CVE-2023-7221?

CVE-2023-7221 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2023-7221?

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-2023-7221?

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

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Source: NVD / NIST