TI-2026-79012 Aliases CVE-2026-114382 GHSA-q7j2-7qg9-m53h

Stack-based buffer overflow in TOTOLINK EX200 setStaticDhcpConfig

HIGH 82CWE-119Published 2026-10-21 · Updated 2026-10-28

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

TOTOLINK EX200 starting at version 5.2.3c.7200 is affected. Manipulating the Comment argument of the setStaticDhcpConfig function in the lan.so component of /cgi-bin/cstecgi.cgi causes a stack-based buffer overflow (CWE-121). A remote attacker without privileges or user interaction can trigger it. A public exploit has been released and may be used for attacks.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A security flaw has been discovered in TOTOLINK EX200 5.2.3c.7200. This affects the function setStaticDhcpConfig of the file /cgi-bin/cstecgi.cgi of the component lan.so. The manipulation of the argument Comment results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00667 52nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

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

Vendor	Product	Affected versions	Fixed in	Status	Source
TOTOLINK	EX200	5.2.3c.7200	—	No fix listed	CNA

EX200 VendorTOTOLINK Affected 5.2.3c.7200 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:ex200_firmware::::::::	—	—	TOTOLINK

cpe:2.3:o:totolink:ex200_firmware:*:*:*:*:*:*:*:* Versions — — ·TOTOLINK

Remediation

The sources list no fixed version for TOTOLINK EX200.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-21 Threatist record created from CVE-2026-114382
2026-10-22 Alias added: GHSA-q7j2-7qg9-m53h
2026-10-28 CISA SSVC decision points changed
2026-10-28 Priority changed: MEDIUM → HIGH

References

Exploit 1

https://github.com/qwq-nm/CVE/blob/f5d61361eb7d846479f6d76c0aa4273e9af46d27/CVE1/report.md

Other 1

https://www.totolink.net/

TI-2023-25090 An issue in TOTOLINK A3700R v.9.1.2u.6165_20211012 allows a remote attacker to execute… CVSS 3.1CRITICAL 9.8
TI-2026-80926 TOTOLINK A950RG stack-based overflow in infostat.cgi via CONTENT_LENGTH CVSS 4.0CRITICAL 10.0
TI-2026-79142 Command injection in TOTOLINK A950RG UploadCustomModule function CVSS 4.0CRITICAL 10.0
TI-2026-79031 TOTOLINK EX200 setWiFiAclAddConfig stack-based buffer overflow CVSS 4.0CRITICAL 10.0
TI-2026-67719 Stack-based overflow in Totolink A3002MU QoS rule handler CVSS 4.0CRITICAL 10.0
TI-2026-67718 Improper authorization in Totolink A3002MU authentication check CVSS 4.0CRITICAL 10.0

See all 1317 →

Sources

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