TI-2025-05549 Aliases CVE-2025-6139 GHSA-596f-hgfj-9vg7

TOTOLINK T10 shadow.sample hard-coded password

MEDIUM 44CWE-255Published 2025-06-16 · Updated 2025-06-17

Key facts

Attack vector: Adjacent network
Privileges required: High
User interaction: None
Attack complexity: High
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-259.

Summary

A vulnerability, which was classified as problematic, has been found in TOTOLINK T10 4.1.8cu.5207. Affected by this issue is some unknown functionality of the file /etc/shadow.sample. The manipulation leads to use of hard-coded password. The attack can only be initiated within the local network. The complexity of an attack is rather high. The exploitation is known to be difficult. 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 0.00404 34th 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: Partial

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_b20210320:::::::*	4.1.8cu.5207_b20210320	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:t10:2.0:::::::*	2.0	Running on	TOTOLINK

cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5207_b20210320:*:*:*:*:*:*:* Versions 4.1.8cu.5207_b20210320 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:t10:2.0:*:*:*:*:*:*:* Versions 2.0 Running on ·TOTOLINK

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-6139
2026-10-03 Alias added: GHSA-596f-hgfj-9vg7

References

Exploit 1

https://candle-throne-f75.notion.site/TOTOLINK-T10-shadow-20ddf0aa118580f5a455cd5dbc521472

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