IBM i is Affected by Algorithm Downgrade in Transport Layer Security []
Summary
| CVE | CVE-2026-4942 |
|---|---|
| State | PUBLISHED |
| Assigner | ibm |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-17 20:17:23 UTC |
| Updated | 2026-07-17 20:17:23 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.9 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Problem Types: CWE-757 | CWE-757 CWE-757 Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | CNA | CVSS | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ibm.com/support/pages/node/7278992 | [email protected] | www.ibm.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6MJ09141 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09141 7.5MJ09140 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09140 7.4MJ09139 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09139 7.3MJ09138 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ09138 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.