CVE-2019-11001: Reolink Multiple IP Cameras OS Command Injection Vulnerability

CVE-2019-11001 is an authenticated OS command injection vulnerability affecting multiple Reolink IP camera models. An attacker who already has admin credentials can abuse the cameras' TestEmail feature to inject and execute operating-system commands with root privileges. Full device takeover is possible once that access is obtained, which can expose live video feeds, stored recordings, network credentials, and any other data the camera can reach. Because many of these devices sit on internal networks or are reachable from the internet, the risk extends beyond the camera itself.

The vulnerability is catalogued under CWE-78. Public detail is limited to the models and attack surface named by CISA; exact firmware versions, CVSS scores, and exploit mechanics must be confirmed against the vendor advisory.

How it works

CWE-78 covers improper neutralization of special elements used in an OS command. In this case the camera's TestEmail functionality accepts input that is later passed to a system shell without adequate sanitization. An authenticated administrator can craft that input so that additional commands are executed with root privileges. The attacker does not need to break authentication first; once admin access is obtained (through credential reuse, phishing, or other means), the injection path is available. Because the commands run as root, the attacker can install persistence, open reverse shells, alter configuration, or pivot deeper into the network. No further exploit details are provided in the public record, so defenders should treat any authenticated use of the TestEmail feature on the listed models as potentially dangerous until the vendor advisory is reviewed.

Am I affected? How to find it in your systems

The vulnerability is reported for the Reolink RLC-410W, C1 Pro, C2 Pro, RLC-422W, and RLC-511W IP cameras. These devices are commonly deployed for perimeter, office, or home surveillance and may be managed through a web interface, mobile app, or NVR. Inventory steps:

• Enumerate all network cameras via asset-management tools, DHCP leases, or Nmap service scans looking for Reolink banners or typical HTTP/HTTPS ports.
• Log into each camera's web UI or management console and record the exact model string and firmware version.
• Compare the model against the list above; if it matches, treat the device as potentially vulnerable until the vendor advisory confirms otherwise.
• Search configuration backups or change-management records for any prior use of the TestEmail function.

Telemetry signs of exploitation are limited because the attack requires valid admin credentials. Look for unusual TestEmail activity in the camera's system logs, unexpected outbound connections from the camera's IP, or new processes/files that appear after an admin session. Centralized syslog or SIEM collection from the cameras (if supported) improves detection.

How to remediate

Apply the vendor-supplied firmware update named in the official Reolink advisory for the affected models. Confirm the exact fixed version and installation procedure against that advisory before deploying. After patching, re-verify the firmware version on every device and change any admin credentials that may have been used during the vulnerable period.

CISA notes that the impacted product could be end-of-life or end-of-service. If no current mitigation or firmware update is available, discontinue use of the device and replace it with a supported model. In addition, enforce strong, unique admin passwords, disable unused services, and ensure cameras are not reachable from untrusted networks.

If you can't patch immediately

Until a patch or replacement is in place, reduce exposure with the following compensating controls:

• Segment the cameras onto an isolated VLAN with no direct internet access and strict firewall rules that allow only necessary management traffic from trusted jump hosts.
• Disable the TestEmail (or any email-notification) feature if the camera's configuration permits it; this removes the known injection surface.
• Place a web-application firewall or reverse proxy in front of the camera's management interface and block or tightly restrict the TestEmail endpoint if it can be identified.
• Monitor authentication logs and network traffic for anomalous admin logins or unexpected outbound connections originating from the camera.
• Rotate admin credentials and enforce multi-factor authentication on any upstream management portals that control the cameras.

These measures do not eliminate the vulnerability but shrink the window of opportunity until the device can be updated or retired.

If your data may have been exposed

Actively exploited vulnerabilities of this class can lead to full device compromise and subsequent data exposure. Review camera logs and network telemetry for signs of unauthorized access. As a further check, you can run a free exposure scan of your email addresses against known breach data sets to determine whether credentials associated with the cameras or related accounts have already appeared in public dumps.