Tenda AC9 Administrative shadow hard-coded credentials

published 2025-08-31 14 mo ago modified 2026-10-18 21 d ago also EUVD-2025-26297

cvss: 2.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

A vulnerability was determined in Tenda AC9 15.03.05.19. The impacted element is an unknown function of the file /etc_ro/shadow of the component Administrative Interface. This manipulation causes hard-coded credentials. It is possible to launch the attack on the local host. The attack's complexity is rated as high. The exploitability is regarded as difficult. The exploit has been publicly disclosed and may be utilized.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 14 mo ago (2025-09-02)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/August829/Yu/blob/main/58ead8e7e08bfb0e4.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.0	CVSS: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
CNA	3.1	2.5	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CNA	3.0	2.5	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
CNA	2.0	1.0	AV:L/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR
CNA	4.0	1.1	CVSS: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
CNA	3.1	2.5	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	7.0	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	1.0	AV:L/AC:H/Au:S/C:P/I:N/A:N

Affected products

Tenda AC9

Classification

Weakness

CWE-798 Use of Hard-coded Credentials
CWE-259 Use of Hard-coded Password

References

github.com /August829/Yu/blob/main/58ead8e7e08bfb0e4.md
exploit, third-party-advisory
vuldb.com /?id.322022
vdb-entry, third-party-advisory
vuldb.com /?ctiid.322022
signature, permissions-required
vuldb.com /?submit.639748
third-party-advisory, vdb-entry
tenda.com.cn /
product

Sources

CVE List CVE-2025-9731
NVD CVE-2025-9731

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary