CVE-2026-1742
Published: 02 February 2026
Summary
CVE-2026-1742 is a medium-severity Improper Access Control (CWE-284) vulnerability in Iptime A8004T Firmware. Its CVSS base score is 4.7 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Web Shell (T1100); ranked at the 2.6th 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 server-side CGI/VPN component directly enables placement of arbitrary executable content such as web shells for persistence and remote code execution.
NVD Description
A vulnerability was identified in EFM ipTIME A8004T 14.18.2. Affected by this vulnerability is the function commit_vpncli_file_upload of the file /cgi/timepro.cgi of the component VPN Service. Such manipulation leads to unrestricted upload. It is possible to launch the attack remotely.…
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The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2026-1742 is an unrestricted file upload vulnerability affecting the EFM ipTIME A8004T router running firmware version 14.18.2. The issue resides in the commit_vpncli_file_upload function within the /cgi/timepro.cgi script of the VPN Service component. This flaw, associated with CWE-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type), allows manipulation that bypasses file upload restrictions.
The vulnerability can be exploited remotely over the network with low attack complexity and no user interaction required, but it demands high privileges (PR:H), such as administrative access. Successful exploitation grants limited impact: low confidentiality, integrity, and availability effects (CVSSv3.1 base score of 4.7). Attackers could upload malicious files via the VPN service, potentially leading to further compromise depending on the uploaded content.
Advisories from VulDB indicate that the vendor was contacted early about the disclosure but provided no response, with no patches or mitigations mentioned. References include a public exploit in a GitHub issue and VulDB entries detailing the vulnerability.
Notable context includes a publicly available exploit, increasing the risk of active use against unpatched devices.
Details
- CWE(s)