High severity · published Aug 17, 2025
CVE-2025-9091
Tenda AC20 shadow hard-coded credentials
7.8
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC20 · Tenda
16.03.08.12 · source: vendor
AF
Ac20 Firmware · Tenda
16.03.08.12 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9091
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9091
Exploit
https://github.com/ZZ2266/.github.io/blob/main/AC20/hardcoded%20password/readme.md#description
Exploit
https://github.com/ZZ2266/.github.io/tree/main/AC20/hardcoded%20password/readme.md
Permissions Required
https://vuldb.com/?ctiid.320359
Third Party Advisory
https://vuldb.com/?id.320359
Third Party Advisory
https://vuldb.com/?submit.632268
Product
https://www.tenda.com.cn/
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