Is CVE-2023-7221 actively exploited?

No active exploitation of CVE-2023-7221 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-7221 be exploited remotely?

Yes. CVE-2023-7221 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-7221?

CVE-2023-7221 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-7221

CRITICAL

CVE-2023-7221

CWE-120Published: January 9, 2024· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Risk Analysis

Totolink T6 4.1.9cu.5241_B20210923 contains a critical buffer overflow vulnerability in the login function. This allows remote attackers to trigger a crash or potentially execute code, earning a 9.8 CVSS score. The vendor is unresponsive, and it is not in the CISA KEV.

No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable.

Recommended Action

Given the lack of vendor response, users should restrict management access to the device or replace it.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-7221 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.