CVE-2025-9091 - CVE House
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Status published Low CVE-2025-9091

Tenda AC20 shadow hard-coded credentials

Vulnerability Description

A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is an unknown functionality of the file /etc_ro/shadow. The manipulation leads to hard-coded credentials. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • n0ps1ed (VulDB User)

References

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Affected Vendor

Affected Software

AC20
Vulnerable Versions:
16.03.08.12

Timeline

Official Publish: August 17th, 2025
Last Modified: August 18th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

Weaknesses (CWE)

CWE-798 CWE-259

MITRE ATT&CK TTPs

T1552 Unsecured Credentials
Credential Access
T1078 Valid Accounts
Persistence
T1021 Remote Services
Lateral Movement
T1190 Exploit Public-Facing Application
Initial Access
T1098 Account Manipulation
Privilege Escalation
T1005 Data from Local System
Collection