Security Flaw in Tenda AC20 Reveals Hard-Coded Credentials Vulnerability
CVE-2025-9091

2LOW

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
17 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9091?

A security flaw in the Tenda AC20, specifically in version 16.03.08.12, has been identified, affecting an unknown functionality within the file /etc_ro/shadow. This vulnerability exposes hard-coded credentials, which can potentially allow unauthorized access when exploited by attackers. Although the complexity of successfully carrying out an attack is considered high, the information regarding the exploit is already public, raising concerns for users regarding their device security. It is crucial for users of affected devices to take immediate action to mitigate these risks.

Affected Version(s)

AC20 16.03.08.12

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-9091 - Proof of Concept

References

https://vuldb.com/?id.320359
vdb-entry
https://vuldb.com/?ctiid.320359
signaturepermissions-required
https://vuldb.com/?submit.632268
third-party-advisory

CVSS V4

Score:
2
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

n0ps1ed (VulDB User)
.
CVE-2025-9091 : Security Flaw in Tenda AC20 Reveals Hard-Coded Credentials Vulnerability