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CVE-2026-18668— Protection Mechanism Failure vulnerability affects IBM Sterling File Gateway

Quick assessment

Affected
IBM Sterling File Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM Sterling File Gateway 6.2.1.0 至 6.2.1.2_1 以及 6.2.2.0 至 6.2.2.1_1 版本中，由于存在安全配置错误，可能允许远程攻击者执行协议降级攻击。

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-18668

Vulnerability Information
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Vulnerability Title
Protection Mechanism Failure vulnerability affects IBM Sterling File Gateway
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM Sterling File Gateway 6.2.1.0 ~ 6.2.1.2_1, 6.2.2.0 - 6.2.2.1_1 cpe:2.3:a:ibm:sterling_file_gateway:6.2.1.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-18668

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III. Intelligence Information for CVE-2026-18668

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Other References for CVE-2026-18668 (1)

Same Patch Batch · IBM · 2026-11-08 · 58 CVEs total

CVE-2026-107331 9.9 CRITICAL DataStage on Cloud Pak for Data has several vulnerabilities
CVE-2026-15266 9.8 CRITICAL Multiple Vulnerabilities in IBM Concert Software
CVE-2026-114464 9.3 CRITICAL Multiple security vulnerabilities are addressed with IBM Process Mining Interim Fix for Oc
CVE-2026-17466 9.1 CRITICAL IBM Optim Test Data Management 1.0.0, 1.1.0, and 1.2.0 impacted by Path Traversal, Rate Li
CVE-2026-101117 9.1 CRITICAL IBM WebSphere eXtremes Scale Liberty deployment is affected by Cross Site Scripting(XSS) a
CVE-2026-117545 8.8 HIGH IBM webMethods Integration Server is vulnerable of bypassing the two-factor authentication
CVE-2026-110273 8.8 HIGH Security Vulnerability identified in IBM TRIRIGA - Command Execution
CVE-2026-116501 8.4 HIGH Qiskit SDK C API may trigger an out of bounds write on accessing the unitary matrix with q
CVE-2026-116499 8.4 HIGH Arbitrary Code Execution in Qiskit SDK QPY Deserialization
CVE-2026-19133 8.1 HIGH TS4500 Tape Library addresses security vulnerability
CVE-2026-105467 8.1 HIGH IBM QRadar SIEM is vulnerable to Open Redirect and Reflected XSS
CVE-2026-107330 7.7 HIGH DataStage on Cloud Pak for Data has several vulnerabilities
CVE-2026-18093 7.5 HIGH IBM App Connect Enterprise is vulnerable to a credential exposure
CVE-2026-18893 7.1 HIGH CockroachDB PostgreSQL for IBM VPC is affected by multiple vulnerabilities
CVE-2026-14437 6.5 MEDIUM IBM Storage Scale Path Traversal
CVE-2026-3684 6.5 MEDIUM Vulnerabilities exists in IBM Cloud Pak for Data System
CVE-2026-16427 6.5 MEDIUM DataStage on Cloud Pak for Data has several vulnerabilities
CVE-2026-108284 6.5 MEDIUM IBM WebSphere Application Server Liberty prior to 26.0.0.11 is affected by multiple vulner
CVE-2026-18484 6.5 MEDIUM IBM ContextForge MCP Gateway is affected by a denial-of-service via tool name collision th
CVE-2026-16433 6.5 MEDIUM DataStage on Cloud Pak for Data has several vulnerabilities

Showing top 20 of 58 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Sterling File Gateway
Same vendor: IBM
Same weakness: CWE-693