CVE-2025-9091: ac20 Hardcoded Password — Exploit

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.

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CVSS v3.1 Score

2.5

LOW

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-259 CWE-259

CWE-798 CWE-798

Affected Products

Vendor	Product	Versions
tenda	ac20_firmware	All
tenda	ac20	All

References

Exploits

https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description https://github.com/ZZ2266/.github.io/tree/main/AC20/hardcoded%20password/readme.md https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description

Other References

https://vuldb.com/?ctiid.320359 https://vuldb.com/?id.320359 https://vuldb.com/?submit.632268 https://www.tenda.com.cn/

Frequently Asked Questions

What is CVE-2025-9091? +

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. It has a CVSS v3.1 base score of 2.5 (LOW).

How severe is CVE-2025-9091? +

CVE-2025-9091 has a CVSS v3.1 score of 2.5 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-9091? +

CVE-2025-9091 affects products from tenda, specifically: ac20, ac20_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-9091? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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