TI-2025-05327 Aliases CVE-2025-5901 GHSA-jfcx-jqxf-6323

TOTOLINK T10 POST Request cstecgi.cgi UploadCustomModule buffer overflow

HIGH 73CWE-119Published 2025-06-09 · Updated 2025-06-10

Key facts

Attack vector: Network
Privileges required: Low
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 has been found in TOTOLINK T10 4.1.8cu.5207 and classified as critical. This vulnerability affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument File leads to buffer overflow. The attack can 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 0.06877 94th 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: No
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	T10	4.1.8cu.5207	—	No fix listed	CNA

T10 VendorTOTOLINK Affected 4.1.8cu.5207 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5207:::::::*	4.1.8cu.5207	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:t10:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5207:*:*:*:*:*:*:* Versions 4.1.8cu.5207 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:t10:-:*:*:*:*:*:*:* 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-2025-5901
2026-10-03 Alias added: GHSA-jfcx-jqxf-6323

References

Exploit 1

https://candle-throne-f75.notion.site/TOTOLINK-T10-UploadCustomModule-20bdf0aa118580d59961cd545582c118

Other 1

https://www.totolink.net/

TI-2024-07569 TOTOLINK T10 AC1200 Telnet Service product.ini hard-coded credentials CVSS 4.0CRITICAL 9.3
TI-2025-05548 TOTOLINK T10 HTTP POST Request cstecgi.cgi setWizardCfg buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05547 TOTOLINK T10 HTTP POST Request cstecgi.cgi setWiFiScheduleCfg buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05331 TOTOLINK T10 POST Request cstecgi.cgi setWiFiRepeaterCfg buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05330 TOTOLINK T10 POST Request cstecgi.cgi setWiFiMeshName buffer overflow CVSS 4.0HIGH 8.7
TI-2025-05329 TOTOLINK T10 POST Request cstecgi.cgi setWiFiAclRules buffer overflow CVSS 4.0HIGH 8.7

See all 21 →

Sources

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