PT-2026-55583
CVE-2026-4942
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Published
2026-07-03
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Updated
2026-07-20
Description by
CVSS 3.1
7.5
HighMetricsAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Name of the Vulnerable Software and Affected Versions
IBM i versions 7.3 through 7.6
Description
A remote attacker can send a specifically crafted message to downgrade the Transport Layer Security (TLS) protocol to a version that has been disabled in the server configuration. This issue involves the selection of a less-secure algorithm during negotiation, known as an algorithm downgrade.
Recommendations
For version 7.6, apply MJ09141.
For version 7.5, apply MJ09140.
For version 7.4, apply MJ09139.
For version 7.3, apply MJ09138.
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