CVE-2026-30140
Published: 09 March 2026
Summary
CVE-2026-30140 is a high-severity Improper Access Control (CWE-284) vulnerability in Tenda W15E Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 19.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.
Supervision and review of access control activities directly detects and remediates improper access configurations or usages.
Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.
By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.
Associating and retaining security attributes with data directly supports enforcement of access control decisions across storage, processing, and transmission.
Requiring prior authorization for each remote access type prevents improper access control over remote connections.
Requiring authorization of wireless access before allowing connections enforces proper access control for this access method.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Vulnerability is an unauthenticated remote access control flaw in a router web endpoint that directly exposes a config file containing plaintext admin credentials; maps to T1190 for exploitation of the public-facing application and T1552.001 for retrieval of unsecured credentials stored in files.
NVD Description
An incorrect access control vulnerability exists in Tenda W15E V02.03.01.26_cn. An unauthenticated attacker can access the /cgi-bin/DownloadCfg/RouterCfm.jpg endpoint to download the configuration file containing plaintext administrator credentials, leading to sensitive information disclosure and potential remote administrative access.
Deeper analysisAI
CVE-2026-30140 is an incorrect access control vulnerability (CWE-284) in the Tenda W15E router running firmware version V02.03.01.26_cn. Published on 2026-03-09T19:16:07.303, it carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). The flaw enables an unauthenticated attacker to access the /cgi-bin/DownloadCfg/RouterCfm.jpg endpoint, which serves a configuration file containing plaintext administrator credentials.
Any unauthenticated attacker with network access to the affected router can exploit this vulnerability with low complexity and no user interaction required. Exploitation allows downloading the configuration file, resulting in high-impact sensitive information disclosure, including administrator credentials. This disclosure could facilitate subsequent remote administrative access to the device.
Details on mitigation, including any patches or workarounds, are documented in the advisory at https://github.com/jhx-ui/CVE-Reports/blob/main/README.md#vulnerability-report-tenda-router-sensitive-information-disclosure.
Details
- CWE(s)