CVE-2026-101054

Executive Summary

CVE-2026-101054 is an improper access control vulnerability in the Thinkware U3000 dashcam (firmware versions up to 1.02.04), specifically affecting the get_file function within the TCP service that handles the /tmp/wpa_supplicant.conf file. A remote, unauthenticated attacker can exploit this flaw to read sensitive Wi-Fi configuration data, including pre-shared keys, with low confidentiality impact. The vendor was contacted but did not respond, and no patch is currently available, leaving all deployed units at risk.

Technical Analysis

The vulnerability resides in the TCP service component of the Thinkware U3000 firmware. The affected function get_file improperly enforces access controls when handling requests for /tmp/wpa_supplicant.conf, a file that stores Wi-Fi supplicant configuration, typically including network SSIDs and pre-shared keys (PSKs). CWE-266 (Incorrect Privilege Assignment) indicates that the service fails to verify the privilege level of the requester before granting access to this file. Because the service is exposed over the network (CVSS vector AV:N), any remote attacker who can reach the TCP port can invoke get_file without authentication (PR:N) and with no user interaction (UI:N). The attack complexity is low (AC:L), and the only impact is a confidentiality breach (C:L) — the attacker gains read access to the configuration file. Integrity and availability are unaffected. The NVD description does not specify the exact TCP port, protocol details, or authentication mechanism, so those implementation specifics remain unknown. The core issue is a missing or flawed authorization check that allows unprivileged network clients to retrieve a sensitive file.

Exploitation Scenarios

1. Reconnaissance/target identification: An attacker scans the internet or local network for exposed Thinkware U3000 dashcams, likely using Shodan dorks such as product:"Thinkware U3000" or by probing common dashcam TCP ports. The device must be network-accessible (e.g., via its Wi-Fi hotspot or if connected to a public network).
2. Triggering the flaw: The attacker sends a crafted request to the TCP service that invokes the get_file function, specifying the path /tmp/wpa_supplicant.conf. Due to improper access controls, the service processes the request without verifying that the requester is authorized to read that file.
3. Payload/execution: No exploit code is publicly available (POC_STATUS: None). The attack chain is inferred from the vulnerability class: the request likely includes a file path parameter or command that the service fails to sanitize or restrict. The attacker simply requests the file and receives its contents.
4. Post-exploitation impact: The attacker obtains the contents of /tmp/wpa_supplicant.conf, which may contain Wi-Fi network credentials (SSIDs and PSKs). This information can be used to pivot into the associated Wi-Fi network, eavesdrop on traffic, or launch further attacks against other devices on that network. The impact is limited to confidentiality (C:L) and does not allow code execution or denial of service.

Impact Assessment

The CVSS v3.1 base score is 5.3 (Medium), with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. The attack is network-accessible, requires no privileges or user interaction, and has low complexity. Only confidentiality is impacted (low), as the attacker can read a configuration file containing Wi-Fi credentials. Integrity and availability are not affected. The blast radius includes any Thinkware U3000 device with firmware up to 1.02.04 that is reachable over the network. Because the device is often used in vehicles and may connect to home or public Wi-Fi, compromise could lead to lateral movement into trusted networks. The vendor has not responded, and no patch exists, so the exposure persists indefinitely. The EPSS score is not yet available, and the CVE is not in CISA KEV, but the public exploit availability (as stated in the NVD description) raises the risk of opportunistic attacks.

Detection Guidance

Sigma Rule

title: Thinkware U3000 Improper Access Control - wpa_supplicant.conf Access
id: 3a4b5c6d-7e8f-9a0b-1c2d-3e4f5a6b7c8d
status: experimental
description: Detects network requests attempting to access /tmp/wpa_supplicant.conf via the Thinkware U3000 TCP service, indicating CVE-2026-101054 exploitation.
author: Threat Intelligence Team
date: 2026-01-15
logsource:
  category: network_connection
  product: suricata
detection:
  selection:
    destination_port: 80  # Placeholder; actual port unknown, adjust based on environment
    payload|contains:
      - 'get_file'
      - '/tmp/wpa_supplicant.conf'
  condition: selection
falsepositives:
  - Legitimate administrative access to the device
level: high
tags:
  - attack.t1190
  - cve.2026-101054

YARA Rule

rule CVE_2026_101054_Thinkware_U3000_Access
{
    meta:
        description = "Detects strings associated with CVE-2026-101054 in Thinkware U3000 firmware or network traffic"
        author = "Threat Intelligence Team"
        date = "2026-01-15"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-101054"
        hash = "unknown"
    strings:
        $s1 = "get_file" ascii wide nocase
        $s2 = "/tmp/wpa_supplicant.conf" ascii wide nocase
        $s3 = "Thinkware U3000" ascii wide nocase
    condition:
        any of them
}

Suricata IDS Rule

alert tcp any any -> any any (msg:"CVE-2026-101054 Thinkware U3000 Improper Access Control Attempt"; flow:to_server,established; content:"get_file"; nocase; content:"/tmp/wpa_supplicant.conf"; nocase; classtype:attempted-recon; sid:10000001; rev:1;)

Elastic Detection

network where network.protocol == "tcp" and
  process.name == "thinkware_service" and
  stringContains(network.payload, "get_file") and
  stringContains(network.payload, "/tmp/wpa_supplicant.conf")

Splunk SPL Query

index=network_traffic sourcetype=suricata
| search "get_file" AND "/tmp/wpa_supplicant.conf"
| stats count by src_ip, dest_ip, dest_port
| where count > 0

Wazuh OSSEC Rule

<group name="thinkware,">
  <rule id="100001" level="10">
    <decoded_as>json</decoded_as>
    <field name="payload">get_file</field>
    <field name="payload">/tmp/wpa_supplicant.conf</field>
    <description>CVE-2026-101054: Thinkware U3000 improper access control attempt detected</description>
    <mitre>
      <id>T1190</id>
    </mitre>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 (UNPATCHED — no patch evidence from any tracked source).

1. Immediate mitigations:

   • Disable remote access to the TCP service if not required. If the device must be network-accessible, restrict access to trusted IP addresses using firewall rules or network segmentation.
   • Change default Wi-Fi credentials and avoid storing sensitive pre-shared keys in /tmp/wpa_supplicant.conf where possible. However, this file is typically auto-generated by the system, so manual modification may not be feasible.
   • Monitor network traffic for suspicious requests containing get_file or /tmp/wpa_supplicant.conf using the detection rules above.
   • Isolate affected dashcams on a separate VLAN with no access to critical internal networks.

2. Patch/upgrade steps:

   • No patch is available. The vendor (Thinkware) was contacted but did not respond. Monitor the vendor's official website and security advisories for future firmware updates. Until a patch is released, consider the device inherently vulnerable.

3. Long-term hardening:

   • Replace end-of-life or unresponsive vendor devices with alternatives that receive regular security updates.
   • Implement network access control (NAC) to prevent unauthorized devices from connecting to the network.
   • Conduct regular vulnerability scans and penetration tests on IoT devices, especially those with network services.
   • Enforce the principle of least privilege for all device services and ensure proper authentication and authorization checks are in place.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-101054
• CWE-266: https://cwe.mitre.org/data/definitions/266.html
• MITRE ATT&CK T1190: https://attack.mitre.org/techniques/T1190/
• Vendor website (Thinkware): https://www.thinkware.com/ (no advisory available)
• CISA KEV: Not applicable (CVE not listed as of 2026-01-15)