HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-67192 — Xlight FTP Server before 3.9.5 contains a pre-authentication stack buffer overfl...

·Source: NIST NVD

Updated:

Executive Summary

Xlight FTP Server before 3.9.5 contains a pre-authentication stack buffer overflow vulnerability that allows unauthenticated attackers to corrupt stack memory by sending malformed SSH packets when a GCM cipher is negotiated. Attackers can craft packets with an unvalidated length field passed directly to the GCM decrypt function, overwriting the stack cookie and return address to potentially achiev

Analysis

Xlight FTP Server before 3.9.5 contains a pre-authentication stack buffer overflow vulnerability that allows unauthenticated attackers to corrupt stack memory by sending malformed SSH packets when a GCM cipher is negotiated. Attackers can craft packets with an unvalidated length field passed directly to the GCM decrypt function, overwriting the stack cookie and return address to potentially achieve remote code execution before any authentication occurs. CVSS Score: 8.1. Published: 2026-07-29T16:17:57.683.

Indicators of Compromise (1)

CVE (1)
CVE-2026-67192
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Jul 29, 2026. Verified by: NIST.

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