Read the docs
TI-2023-20932 Aliases CVE-2023-40042GHSA-vcx8-fvxx-m3v6

TOTOLINK T10_v2 5.9c.5061_B20200511 has a stack-based buffer overflow in…

Priority HIGH 82CWE-787Published · 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 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

TOTOLINK T10_v2 5.9c.5061_B20200511 has a stack-based buffer overflow in setStaticDhcpConfig in /lib/cste_modules/lan.so. Attackers can send crafted data in an MQTT packet, via the comment parameter, to control the return address and execute code.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01535 74th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by 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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:totolink:t10_v2_firmware:5.9c.5061_b20200511:*:*:*:*:*:*:*5.9c.5061_b20200511VulnerableTOTOLINK
cpe:2.3:h:totolink:t10_v2:-:*:*:*:*:*:*:*not specified by NVDRunning onTOTOLINK
  • cpe:2.3:o:totolink:t10_v2_firmware:5.9c.5061_b20200511:*:*:*:*:*:*:* Versions 5.9c.5061_b20200511 Vulnerable ·TOTOLINK
  • cpe:2.3:h:totolink:t10_v2:-:*:*:*:*:*:*:* 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-2023-40042
  2. 2026-10-03 Alias added: GHSA-vcx8-fvxx-m3v6

References

Exploit 1

Other 2

  • TI-2023-20931 TOTOLINK T10_v2 5.9c.5061_B20200511 has a stack-based buffer overflow in setWiFiWpsConfig… CVSS 3.1CRITICAL 9.8
  • TI-2022-08830 TOTOLink T10 V5.9c.5061_B20200511 was discovered to contain a command injection… CVSS 3.1CRITICAL 9.8
  • TI-2021-19495 Two Buffer Overflow vulnerabilities exists in T10 V2_Firmware V4.1.8cu.5207_B20210320 in… CVSS 3.1CRITICAL 9.8

Sources

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