Vulnerability · Published Jul 17, 2026 · Assigned by ibm
CVE-2026-4942IBM i is Affected by Algorithm Downgrade in Transport Layer Security []
Medium 5.9
In plain English
A medium-severity security flaw in i from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.4%top 62.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-757 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://www.ibm.com/support/pages/node/7278992 vendor-advisory, patch