IBM Sterling File Gateway 6.2.1.x/6.2.2.x Protocol Downgrade via Misconfig
CVE-2026-18668 Published on November 8, 2026
Protection Mechanism Failure vulnerability affects IBM Sterling File Gateway
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.
Vulnerability Analysis
CVE-2026-18668 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Protection Mechanism Failure
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. This weakness covers three distinct situations. A "missing" protection mechanism occurs when the application does not define any mechanism against a certain class of attack. An "insufficient" protection mechanism might provide some defenses - for example, against the most common attacks - but it does not protect against everything that is intended. Finally, an "ignored" mechanism occurs when a mechanism is available and in active use within the product, but the developer has not applied it in some code path.
Products Associated with CVE-2026-18668
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Affected Versions
IBM Sterling File Gateway:- Version 6.2.1.0, <= 6.2.1.2_1, 6.2.2.0 - 6.2.2.1_1 is affected.