CVE-2026-58452: JAIOTlink C492A-W6 Camera RCE Vulnerability

CVE-2026-58452 Overview

CVE-2026-58452 is an OS command injection vulnerability [CWE-78] affecting JAIOTlink C492A-W6 Wi-Fi IP cameras running firmware 4.8.30.57701411. The flaw resides in the HTTP PUT NetSDK/Factory SetMAC endpoint, which processes a Wireless parameter without sufficient sanitization before passing it to a shell command. Authenticated attackers can achieve remote code execution on the camera by supplying a crafted string that begins with a MAC-like prefix, a semicolon, and an arbitrary shell payload. The malformed input bypasses partial sscanf() validation and reaches a system() wrapper unmodified.

Critical Impact
Authenticated network attackers can execute arbitrary shell commands as the camera process, resulting in full device compromise, surveillance video access, and potential pivoting into internal networks.

Affected Products

JAIOTlink C492A-W6 Wi-Fi IP Camera
Firmware version 4.8.30.57701411
NetSDK/Factory SetMAC HTTP endpoint

Discovery Timeline

2026-07-01 - CVE-2026-58452 published to NVD
2026-07-01 - Last updated in NVD database

Technical Details for CVE-2026-58452

Vulnerability Analysis

The vulnerability is a classic OS command injection [CWE-78] within the camera's HTTP API. The SetMAC handler accepts a Wireless parameter intended to hold a MAC address. The handler uses sscanf() to parse the leading portion of the input, but it does not reject additional characters following a valid MAC-like prefix. The parsed value is then concatenated into an echo command and executed via a system() wrapper, allowing shell metacharacters to break out of the intended command context.

Because the injected shell runs with the privileges of the camera's web service, an attacker can read the device filesystem, tamper with configuration, retrieve credentials, and use the device as a foothold within the network segment where the camera is deployed. The EPSS score of 2.42% (82nd percentile) reflects meaningful exploitation interest for an authenticated IoT flaw.

Root Cause

The root cause is incomplete input validation. The sscanf() format string matches only a MAC-shaped prefix and does not enforce end-of-string or reject trailing shell metacharacters such as ;, |, or backticks. Data flowing from Wireless into the shell command is neither escaped nor allow-listed.

Attack Vector

Exploitation requires low-privileged authenticated access to the camera's HTTP interface. An attacker issues an HTTP PUT request to NetSDK/Factory SetMAC with a Wireless value structured as a valid MAC prefix, a semicolon, and an arbitrary command. The command executes on the underlying operating system when the handler builds and runs the echo shell string. Refer to the GitHub Command Injection Writeup and the VulnCheck Advisory for JAIOTlink for full technical details.

Detection Methods for CVE-2026-58452

Indicators of Compromise

HTTP PUT requests to NetSDK/Factory SetMAC containing shell metacharacters such as ;, |, &, or backticks in the Wireless parameter.
Wireless values longer than a standard 17-character MAC address, or containing whitespace and command names like sh, wget, curl, or busybox.
Outbound connections from the camera to unexpected hosts shortly after a SetMAC request.

Detection Strategies

Inspect web server and reverse-proxy logs in front of the camera for PUT requests targeting the SetMAC endpoint and flag payloads that do not match a strict MAC-address regular expression.
Deploy network intrusion detection signatures matching the NetSDK/Factory SetMAC URI combined with non-hex characters after the initial MAC prefix.
Correlate camera-originated DNS lookups or TCP connections with the timing of administrative HTTP requests to identify post-exploitation callbacks.

Monitoring Recommendations

Place IP cameras on isolated VLANs and log all north-south HTTP traffic to and from those segments.
Alert on any authentication attempts followed by SetMAC requests from unusual source addresses or user accounts.
Baseline expected camera outbound traffic and alert on deviations such as new destinations, non-standard ports, or unexpected DNS queries.

How to Mitigate CVE-2026-58452

Immediate Actions Required

Restrict network access to the camera's HTTP management interface to trusted administrative hosts using firewall or ACL rules.
Change default and shared credentials on all JAIOTlink C492A-W6 devices to reduce the pool of accounts that can reach the authenticated endpoint.
Disable remote or Internet-facing exposure of the NetSDK/Factory API until a vendor patch is available.

Patch Information

No vendor patch is referenced in the CVE record at publication. Monitor the VulnCheck Advisory for JAIOTlink and the vendor's product pages for firmware updates superseding 4.8.30.57701411.

Workarounds

Segment cameras onto a dedicated VLAN with no route to sensitive corporate resources and block outbound Internet access where operationally feasible.
Enforce strong, unique credentials and rotate them regularly to limit which principals can invoke the vulnerable endpoint.
Place a reverse proxy or web application firewall in front of the camera to reject SetMAC requests whose Wireless parameter does not match a strict 17-character MAC address pattern.

bash

# Example WAF/proxy rule: reject non-MAC Wireless values on SetMAC
# Pseudocode for an inline HTTP filter
if request.method == "PUT" and request.uri contains "NetSDK/Factory" and "SetMAC" in request.body:
    wireless = extract_param(request.body, "Wireless")
    if not re.fullmatch(r"^([0-9A-Fa-f]{2}:){5}[0-9A-Fa-f]{2}$", wireless):
        deny(403, "Invalid Wireless parameter")