CVE-2025-9091

Tenda AC20 shadow hard-coded credentials

2.0 Low

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.25%Up 0.2 points since Aug 17, 2025

What each source reports

CVE List Score used 2.0

Tenda AC20 shadow hard-coded credentials

Record: CVE-2025-9091
CVSS 4.0: 2.0 LowCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CVSS 3.0: 2.5 LowCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CVSS 2.0: 1.0 AV:L/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR
Weakness: CWE-798, CWE-259
Updated: 2026-11-02

EUVDEUVD-2025-25104 2.0

Record: EUVD-2025-25104
CVSS 4.0: 2.0 LowCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vq2h-cfxr-pp9q 1.1

A security flaw has been discovered in Tenda AC20 16.03.08.12. Affected by this vulnerability is...

Record: GHSA-vq2h-cfxr-pp9q
CVSS 4.0: 1.1 LowCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-259
Updated: 2026-11-02

NVD 1.1

Record: CVE-2025-9091
CVSS 4.0: 1.1 LowCVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 1.0 LowAV:L/AC:H/Au:S/C:P/I:N/A:N
Weakness: CWE-259, CWE-798
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-9091 is a low vulnerability (CVSS 2.0) in Tenda Ac20, published August 17, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 17th percentile. No source names a fixed version.