CVE-2026-52480 Overview
CVE-2026-52480 affects the SJRC F11 SJ-GPS-PRO drone firmware build dated 2019-09-17. The vulnerability resides in the inetd service exposed by the device and allows a remote attacker on an adjacent network to obtain sensitive information without authentication. The flaw is categorized as [CWE-306: Missing Authentication for a Critical Function], meaning the inetd-managed services accept requests without verifying the caller's identity. An attacker within Wi-Fi range of the drone can query the exposed services and retrieve data that should be restricted.
Critical Impact
Adjacent-network attackers can retrieve sensitive information from the SJ-GPS-PRO drone over the inetd service without any authentication or user interaction.
Affected Products
- SJRC F11 SJ-GPS-PRO drone
- Firmware build 2019-09-17
- inetd service running on the device
Discovery Timeline
- 2026-08-18 - CVE-2026-52480 published to NVD
- 2026-08-19 - Last updated in NVD database
Technical Details for CVE-2026-52480
Vulnerability Analysis
The SJ-GPS-PRO firmware exposes network services through the inetd super-server daemon. inetd listens on configured ports and spawns handler processes when connections arrive. In this firmware build, one or more services managed by inetd return sensitive device information to any client that connects. The attack requires network adjacency, typically meaning the attacker must associate with the drone's Wi-Fi access point or share the same broadcast domain. No credentials, no user interaction, and no prior compromise are required to trigger the disclosure. The result is confidentiality loss without impact to integrity or availability, consistent with a pure information-exposure flaw.
Root Cause
The root cause is missing authentication on services published through inetd. The service configuration binds handlers to network ports but omits any credential check or access control before returning data. This pattern is common in consumer IoT firmware where developers reuse default inetd service definitions such as diagnostic or status handlers without hardening them for a wireless-exposed deployment.
Attack Vector
An attacker within radio range associates with the drone's wireless interface or joins the same local network segment. The attacker then connects to the inetd-managed TCP port and issues a request. The service responds with sensitive information without prompting for authentication. Refer to the GitHub Security Advisory and the GitHub PoC Repository for reproduction details.
Detection Methods for CVE-2026-52480
Indicators of Compromise
- Unexpected TCP connections to inetd-managed ports on the drone's wireless interface from unknown client MAC addresses.
- Wireless clients associating with the SJ-GPS-PRO access point that do not correspond to the operator's controller device.
- Outbound traffic from the drone containing device identifiers, configuration data, or telemetry sent to unauthorized endpoints.
Detection Strategies
- Monitor the wireless segment for probe requests and associations targeting the drone's SSID from unrecognized stations.
- Capture and inspect traffic to inetd-managed ports on the device to identify plaintext disclosure of sensitive fields.
- Baseline the drone's network behavior during normal operation and alert on deviations in connection volume or client identity.
Monitoring Recommendations
- Deploy a wireless intrusion detection sensor near operational airspace to log associations with drone SSIDs.
- Log all inbound connections on the drone's exposed ports where firmware or a network tap allows it.
- Correlate wireless association events with subsequent TCP sessions to detect reconnaissance activity against the inetd service.
How to Mitigate CVE-2026-52480
Immediate Actions Required
- Operate the SJ-GPS-PRO only in controlled environments where no untrusted wireless clients are within range.
- Configure a strong WPA2 or WPA3 pre-shared key on the drone's access point if the firmware permits, to raise the bar for adjacent-network attackers.
- Power the drone off when not in active use to eliminate the exposure window.
Patch Information
No vendor patch is referenced in the NVD entry or the linked advisory. Consult SJRC directly for updated firmware and monitor the GitHub Security Advisory for changes.
Workarounds
- Disable or firewall the inetd-managed services if the device shell allows configuration changes.
- Restrict wireless range by lowering transmit power or operating in RF-shielded environments during sensitive missions.
- Retire the SJ-GPS-PRO from environments requiring confidentiality guarantees and replace it with a device that authenticates network services.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
