CVE-2026-113802
Received Received - Intake

OS Command Injection in Wavlink WL-WN530BE1-A Firmware

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: VulnCheck

Description
Wavlink WL-WN530BE1-A firmware through M30BE1_V251117 contains an OS command injection vulnerability in the sub_23B54 function of the ioos binary, which passes the unsanitized file_id parameter of /protocol.csp?opt=ovpn_file requests with type=del to popen(). A remote unauthenticated attacker can send a forged IP-FROM: 127.0.0.1 header to bypass login and execute arbitrary commands as root.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-20
Last Modified
2026-10-20
Generated
2026-10-20
AI Q&A
2026-10-20
EPSS Evaluated
N/A
NVD
CVE-2026-113802
EUVD
EUVD-2026-105226

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Wavlink WL-WN530BE1-A M30BE1_V251117

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is an unauthenticated OS command injection flaw in Wavlink WL-WN530BE1-A router firmware version M30BE1_V251117. It exists in the ioos binary's sub_23B54 function which processes /protocol.csp?opt=ovpn_file requests. The file_id parameter is passed unsanitized to popen() allowing command execution. Attackers can bypass authentication by forging an IP-FROM: 127.0.0.1 header and execute arbitrary commands as root.

Detection Guidance

To detect this vulnerability, monitor network traffic for requests to /protocol.csp?opt=ovpn_file with type=del and a malicious file_id parameter. Check for forged IP-FROM: 127.0.0.1 headers in HTTP requests targeting vulnerable Wavlink WL-WN530BE1-A devices with firmware M30BE1_V251117.

Impact Analysis

This vulnerability allows remote unauthenticated attackers to fully compromise the affected router. They can execute arbitrary commands as root, steal sensitive data, install persistent malware, or use the device as a pivot point in larger attacks. Since it bypasses authentication entirely, any internet-facing device with vulnerable firmware is at immediate risk.

Compliance Impact

This vulnerability likely violates compliance requirements for data protection regulations like GDPR and HIPAA due to unauthorized access to sensitive data. Compromised routers could expose personal health information or other regulated data. Organizations using affected devices would need to report breaches and implement compensating controls to maintain compliance.

Mitigation Strategies

Immediately update the Wavlink WL-WN530BE1-A firmware to the latest version. If no patch is available, restrict access to the device's web interface via network segmentation or firewall rules. Disable remote administration and monitor for suspicious activity.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-113802. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart