TI-2025-05040 Aliases CVE-2025-5600 GHSA-8gfp-4v63-m7x8

TOTOLINK EX1200T cstecgi.cgi setLanguageCfg stack-based overflow

HIGH 81CWE-119Published 2025-06-04 · Updated 2025-06-04

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

A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument LangType leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01343 71st 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

Vendor	Product	Affected versions	Fixed in	Status	Source
TOTOLINK	EX1200T	4.1.2cu.5232_B20210713	—	No fix listed	CNA

EX1200T VendorTOTOLINK Affected 4.1.2cu.5232_B20210713 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5232_b20210713:::::::*	4.1.2cu.5232_b20210713	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:ex1200t:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5232_b20210713:*:*:*:*:*:*:* Versions 4.1.2cu.5232_b20210713 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:ex1200t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-5600
2026-10-03 Alias added: GHSA-8gfp-4v63-m7x8

References

Exploit 1

https://kn0sinna.notion.site/TOTOLINK-EX1200T-stack-based-BufferOverflow-vulnerability-204b1876cd6e80709ce8dab4778dce55

Other 1

https://www.totolink.net/

TI-2025-20695 TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command… CVSS 3.1CRITICAL 9.8
TI-2025-20694 TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command… CVSS 3.1CRITICAL 9.8
TI-2025-05966 TOTOLINK EX1200T HTTP POST Request formIpv6Setup buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05794 TOTOLINK A702R/A3002R/A3002RU/EX1200T HTTP POST Request formIPv6Addr buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05737 TOTOLINK EX1200T HTTP POST Request formTmultiAP buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05703 TOTOLINK EX1200T cstecgi.cgi setStaticDhcpConfig stack-based overflow CVSS 4.0HIGH 8.7

See all 36 →

Sources

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