What is CVE-2026-4942?

CVE-2026-4942 is a medium-severity vulnerability in Ibm I, classified under CWE-757. CVSS score: 5.9/10. Published 2026-07-17.

How severe is CVE-2026-4942?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Ibm I

CVE-2026-4942

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.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

CWE-757

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-4942?: CVE-2026-4942 is a medium-severity vulnerability in Ibm I, classified under CWE-757. CVSS score: 5.9/10. Published 2026-07-17.
How severe is CVE-2026-4942?: Medium severity. CVSS v3 base score is 5.9 out of 10.