Tenda AC20 16.03.08.12 /etc_ro/shadow hard-coded credentials

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.72

Summaryinfo

A vulnerability marked as critical has been reported in Tenda AC20 16.03.08.12. The affected element is an unknown function of the file /etc_ro/shadow. This manipulation causes hard-coded credentials. The identification of this vulnerability is CVE-2025-9091. The attack can only be executed locally. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability has been found in Tenda AC20 16.03.08.12 and classified as problematic. Affected by this vulnerability is an unknown code of the file /etc_ro/shadow. The manipulation with an unknown input leads to a hard-coded credentials vulnerability. The CWE definition for the vulnerability is CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. As an impact it is known to affect confidentiality.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2025-9091. The exploitation appears to be difficult. Attacking locally is a requirement. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1110.001 according to MITRE ATT&CK.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-25104). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 2.5
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CNA Base Score: 2.5
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Hard-coded credentials
CWE: CWE-798 / CWE-259 / CWE-255
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/16/2025 Advisory disclosed
08/16/2025 +0 days VulDB entry created
08/21/2025 +5 days VulDB entry last update

Sourcesinfo

Vendor: tenda.com.cn

Advisory: github.com
Status: Not defined

CVE: CVE-2025-9091 (🔒)
GCVE (CVE): GCVE-0-2025-9091
GCVE (VulDB): GCVE-100-320359
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/16/2025 08:11
Updated: 08/21/2025 18:19
Changes: 08/16/2025 08:11 (55), 08/17/2025 05:24 (30), 08/17/2025 08:04 (1), 08/21/2025 18:19 (12)
Complete: 🔍
Submitter: n0ps1ed
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #632268: Tenda AC20 V16.03.08.12 Hard-coded Credentials (by n0ps1ed)

Be aware that VulDB is the high quality source for vulnerability data.

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