[ CVE-2026-86325 · Published 2 Oct 2026 ]
Vulnerability in Moxa MGate MB3170 Series
[ Why it matters ]Priority signals
- Critical severity: CVSS 9.4
[ Description ]Official description
A stack-based buffer overflow vulnerability exists in protocol gateways' account management interface. The vulnerability is caused by insufficient length validation of the `account_name` parameter when processing account management requests. An attacker authenticated as a read-only user to the web management interface could supply a specially crafted account name that exceeds the size of the internal stack buffer, resulting in corruption of program execution flow. Successful exploitation could allow an attacker to read sensitive information from device memory, including credentials, modify arbitrary memory contents, and disrupt device availability.
[ Fixes ]Fixes and patches
- Security bulletin: Moxa MPSA-269540Vendor patch or bulletin · CERT-FR · moxa.com/en/support/product-support/security-advisory/mpsa-269540-cve-, cited by CERT-FR CERTFR-2026-AVI-1250
[ Advisories ]Government CERT advisories
-
CERT-FRCERTFR-2026-AVI-1250
Multiple vulnerabilities in Moxa products Translated from French
Multiple vulnerabilities have been discovered in Moxa products. They allow an attacker to cause a breach of data confidentiality, a breach of data integrity and a security policy bypass.