CVE-2026-3797
Published: 09 March 2026
Summary
CVE-2026-3797 is a medium-severity Improper Access Control (CWE-284) vulnerability in Tiandy Video Surveillance System Firmware. Its CVSS base score is 6.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 3.2th 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.
This control enforces ownership-based restrictions on portable storage device use, directly implementing access control over media insertion into organizational systems.
Hardware write-protect enforces access control on critical resources (e.g., firmware) independent of software state.
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.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in public-facing web app directly enables remote exploitation of the application (T1190) and deployment of web shells via malicious uploaded files (T1100).
NVD Description
A security vulnerability has been detected in Tiandy Video Surveillance System 视频监控平台 7.17.0. The impacted element is the function uploadFile of the file /src/com/tiandy/easy7/core/rest/CLS_REST_File.java. The manipulation of the argument fileName leads to unrestricted upload. The attack may be initiated remotely.…
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The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2026-3797 is an unrestricted file upload vulnerability affecting Tiandy Video Surveillance System (视频监控平台) version 7.17.0. The flaw exists in the uploadFile function within the file /src/com/tiandy/easy7/core/rest/CLS_REST_File.java, where manipulation of the fileName argument enables unrestricted file uploads. It is associated with CWEs-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type), carries a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L), and was published on 2026-03-09.
An attacker with low privileges can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation allows limited impacts on confidentiality, integrity, and availability, potentially enabling malicious file uploads that could lead to further compromise depending on the uploaded content.
Advisories and additional details are documented in references such as VulDB entries (https://vuldb.com/?ctiid.349764, https://vuldb.com/?id.349764, https://vuldb.com/?submit.766386) and a Feishu document (https://my.feishu.cn/docx/P3Bgdl9BHocn66xCMpCcgCD7nhe?from=from_copylink). The vendor was contacted early regarding disclosure but provided no response, and no patches or mitigations are mentioned.
The exploit has been publicly disclosed and may be used by attackers.
Details
- CWE(s)