---
id: "CVE-2026-18668"
page: "https://infrastack.ai/live/CVE-2026-18668"
kind: "vulnerability"
aliases: ["CVE-2026-18668"]
title: "IBM Sterling File Gateway: remote attacker can force protocol downgrade via misconfiguration"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["file-transfer", "ibm-sterling", "self-hosted", "vendor"]
not_affected_if: ["other-versions"]
published_at: "2026-11-08T18:17:04+00:00"
first_seen_at: "2026-11-08T18:22:22+00:00"
updated_at: "2026-11-08T18:22:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18668", "first_seen_at": "2026-11-08T18:22:22+00:00"}]
exploit_sources: []
---

# IBM Sterling File Gateway: remote attacker can force protocol downgrade via misconfiguration

Link for people: https://infrastack.ai/live/CVE-2026-18668 (this .md is for agents)

IBM Sterling File Gateway versions 6.2.1.0 through 6.2.1.2_1 and 6.2.2.0 through 6.2.2.1_1 contain a security misconfiguration. A remote attacker can perform protocol downgrade attacks against the file transfer service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Confirm the installed Sterling File Gateway version against the affected ranges 6.2.1.0 through 6.2.1.2_1 and 6.2.2.0 through 6.2.2.1_1

## Timeline

- 2026-11-08T18:22:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-18668

## From the sources

IBM Sterling File Gateway 6.2.1.0 through 6.2.1.2_1 and  6.2.2.0 - 6.2.2.1_1 could allow a remote attacker to perform protocol downgrade attacks due to a security misconfiguration.

---

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