Improper Authentication in IBM i Affects Multiple Versions
CVE-2026-18318

5.3MEDIUM

Key Information:

Vendor

IBM
Status
I
Vendor
CVE Published:
12 October 2026

What is CVE-2026-18318?

A vulnerability exists in IBM i versions 7.3, 7.4, 7.5, and 7.6 that may allow remote attackers to exploit improper authentication mechanisms. This flaw could enable adversaries to carry out brute-force attacks aimed at obtaining valid user credentials, potentially compromising system security. Organizations using affected versions are advised to implement available patches and enhance their authentication protocols to mitigate risks.

Affected Version(s)

i 7.6

i 7.5

i 7.4

References

https://www.ibm.com/support/pages/node/7290096
vendor-advisorypatch

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.