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TI-2023-06605 Aliases CVE-2023-7221GHSA-c653-w7m8-34r2

Totolink T6 HTTP POST Request main buffer overflow

Priority HIGH 82CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01518 74th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TOTOLINKT64.1.9cu.5241_B20210923—No fix listedCNA
  • T6 VendorTOTOLINK Affected 4.1.9cu.5241_B20210923 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:totolink:t6_firmware:4.1.9cu.5241_b20210923:*:*:*:*:*:*:*4.1.9cu.5241_b20210923VulnerableTOTOLINK
cpe:2.3:h:totolink:t6:-:*:*:*:*:*:*:*not specified by NVDRunning onTOTOLINK
  • cpe:2.3:o:totolink:t6_firmware:4.1.9cu.5241_b20210923:*:*:*:*:*:*:* Versions 4.1.9cu.5241_b20210923 Vulnerable ·TOTOLINK
  • cpe:2.3:h:totolink:t6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-7221
  2. 2026-10-03 Alias added: GHSA-c653-w7m8-34r2

References

Exploit 1

  • TI-2025-07237 TOTOLINK T6 MQTT Service updateWifiInfo buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-07236 TOTOLINK T6 MQTT Service recvSlaveUpgstatus buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-07083 TOTOLINK T6 HTTP POST Request cstecgi.cgi setDiagnosisCfg buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-06798 TOTOLINK T6 HTTP POST Request cstecgi.cgi setWiFiAclRules buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-06289 TOTOLINK T6 formLoginAuth.htm Form_Login missing authentication CVSS 4.0HIGH 8.7
  • TI-2025-07475 TOTOLINK T6 MQTT Packet meshSlaveDlfw tcpcheck_net buffer overflow CVSS 4.0HIGH 8.7
See all 38 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences