CVE-2026-3868

HighCVSS 8.7

Published: 27/04/2026(UTC)Updated: 26/10/2026(UTC)Translated: 05/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.37%

31th percentile - higher than 31% of all known CVEs

Summary

An improper handling of the length parameter inconsistency vulnerability has been identified in Moxa's Secure Router. Due to improper validation of length parameters in the HTTPS management interface, an unauthenticated remote attacker could send specially crafted requests that trigger a buffer overflow, causing the web service to become unresponsive. Successful exploitation may result in a denial-of-service condition requiring a device reboot.

Risk Assessment

The vulnerability allows remote denial of service, potentially disrupting device operation and requiring manual intervention to restore functionality.

Recommendation

Restrict access to the HTTPS management interface to trusted networks and apply available vendor patches.

Other vulnerabilities in Moxa Secure Router

CVE-2026-3867Medium
An improper ownership management vulnerability in Moxa's Secure Router allows a low-privileged authenticated user to access a configuration file containing the hashed password of the administrative account. Exploitation is only possible when the configuration file has been exported, and it does not impact integrity or availability.

Original NVD description (English source)

An improper handling of the length parameter inconsistency vulnerability has been identified in Moxa’s Secure Router. Because of improper validation of length parameters in the HTTPS management interface, an unauthenticated remote attacker could send specially crafted requests that trigger a buffer overflow condition, causing the web service to become unresponsive. Successful exploitation may result in a denial-of-service condition requiring a device reboot to restore normal operation. While successful exploitation can severely impact the availability of the affected device, no impact to the confidentiality or integrity of the affected product has been identified. Additionally, no confidentiality, integrity, or availability impact to the subsequent system has been identified.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS