Cyber Resilience

CVE-2025-6139

Exposed Creds in Totolink T10 Firmware 4.1.8cu.5207_b20210320

Public PoCExposed Creds
Published
16 June 2025
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v4 1.1
Click a component to see what it means
Raw vectorCVSS:4.0/AV:A/AC:H/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0033 26th percentile
Risk Priority 13 floored blend · peak EPSS

Summary

CVE-2025-6139 is a low-severity Use of Hard-coded Password (CWE-259) vulnerability in Totolink T10 Firmware. Its CVSS base score is 1.1 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique Valid Accounts (T1078); ranked at the 26th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to IA-5 (Authenticator Management) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

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…

more

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.

CWE(s)
CWE-255CWE-259

Related Threats

MITRE ATT&CK Enterprise Techniques

T1078 Valid Accounts Stealth
Adversaries may obtain and abuse credentials of existing accounts as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1078.001 Default Accounts Stealth
Adversaries may obtain and abuse credentials of a default account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1552 Unsecured Credentials Credential Access
Adversaries may search compromised systems to find and obtain insecurely stored credentials.
attack.mitre.org →
T1552.001 Credentials In Files Credential Access
Adversaries may search local file systems and remote file shares for files containing insecurely stored credentials.
attack.mitre.org →
T1133 External Remote Services Persistence
Adversaries may leverage external-facing remote services to initially access and/or persist within a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-8162Same product: Totolink T10
CVE-2025-9533Same product: Totolink T10
CVE-2025-5901Same product: Totolink T10
CVE-2024-9001Same product: Totolink T10
CVE-2025-5902Same product: Totolink T10
CVE-2025-5905Same product: Totolink T10
CVE-2025-5904Same product: Totolink T10
CVE-2025-14964Same product: Totolink T10
CVE-2025-5903Same product: Totolink T10
CVE-2025-6138Same product: Totolink T10

Affected Assets

totolink
t10 firmware
4.1.8cu.5207_b20210320

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

IA-5 Authenticator Management partial match

Authenticator management requires secure distribution, rotation, and verification of credentials, directly stopping hard-coded passwords from being introduced or used.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prohibit embedding credentials in source code or binaries.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.17 Authentication information none match
prevents

Requiring users to change temporary or default passwords at first use stops the continued existence of hard-coded or guessable passwords that are shipped with the product.

References