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CVE-2026-4942— IBM i is Affected by Algorithm Downgrade in Transport Layer Security []

CVSS 5.9 · Medium EPSS 0.25% · P17

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProductVersion RangeStatus
IBMi7.6affected
7.5affected
7.4affected
7.3affected
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I. Basic Information for CVE-2026-4942

Vulnerability Information
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Vulnerability Title
IBM i is Affected by Algorithm Downgrade in Transport Layer Security []
Source: CVE Program / CVE List V5
Vulnerability Description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to send a specifically crafted message and downgrade the Transport Layer Security (TLS) protocol to a version disabled in the server configuration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在会话协商时选择低安全性的算法(算法降级)
Source: CVE Program / CVE List V5
Vulnerability Title
IBM i 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM i是美国IBM公司的一个国产服务器操作系统。 IBM i存在加密问题漏洞，该漏洞源于选择明文算法（CWE-757），可能导致远程攻击者发送特制消息并降级传输层安全性协议（TLS）到服务器配置中禁用的版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
IBMi 7.6 cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4942

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III. Intelligence Information for CVE-2026-4942

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Vendor Advisories for CVE-2026-4942 (1)

Same Patch Batch · IBM · 2026-07-17 · 34 CVEs total

CVE-2026-84769.9 CRITICALDisk Cache Deserialization Remote Code Execution Vulnerability
CVE-2026-84819.9 CRITICALRemote Code Execution via Code Validation Endpoint
CVE-2026-86359.9 CRITICALArbitrary Code Execution in Python Interpreter Component
CVE-2026-91359.9 CRITICALPolicies Component Dynamic CodeInput Fields Bypass Custom Component Validation
CVE-2026-88599.9 CRITICALPath Traversal in APIRequest Component via Content-Disposition Header
CVE-2026-134469.8 CRITICALLangflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-85059.8 CRITICALAuthentication Bypass in Webhook Endpoints Allowed Unauthorized Flow Execution
CVE-2026-92029.8 CRITICALUnauthenticated User Registration Could Lead to Remote Code Execution
CVE-2026-91989.8 CRITICALUnauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation
CVE-2026-91039.8 CRITICALUnauthenticated Superuser Token Issuance via Auto-Login Endpoint
CVE-2026-150919.3 CRITICALMultiple Vulnerabilities in IBM Engineering AI hub.
CVE-2026-144998.8 HIGHLangflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-76678.8 HIGHPath Traversal Vulnerability in API Request Component Content-Disposition Header Processin
CVE-2026-77558.8 HIGHMCP Server Configuration Validator Bypass via File Upload API
CVE-2026-80568.8 HIGHParameter Injection Vulnerability in API Graph Execution Engine
CVE-2026-134458.1 HIGHLangflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-134738.1 HIGHIBM Storage Protect Client is vulnerable to Heap-Based Buffer Overflow
CVE-2026-134488.1 HIGHLangflow is affected by remote code execution, denial of service, path traversal, and expo
CVE-2026-97627.8 HIGHIBM® Data Server driver for JDBC and SQLJ is vulnerable to remote code execution when jdbc
CVE-2026-77547.7 HIGHSSRF Protection Configuration Vulnerability

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: i
Same vendor: IBM
Same weakness: CWE-757

V. Comments for CVE-2026-4942

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