PatchSiren cyber security CVE debrief

CVE-2026-7870 IBM CVE debrief

CVE-2026-7870 is a high-severity vulnerability in IBM i 7.6, 7.5, 7.4, and 7.3 that allows a user to gain elevated privileges due to an unqualified library call. A malicious actor could cause user-controlled code to run with administrator privilege. The vulnerability has a CVSS score of 8.8 and is classified as HIGH.

Vendor: IBM
Product: i
CVSS: HIGH 8.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-11
Original CVE updated: 2026-06-11
Advisory published: 2026-06-11
Advisory updated: 2026-06-11

Who should care

Users of IBM i 7.6, 7.5, 7.4, and 7.3 should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by an unqualified library call in IBM i 7.6, 7.5, 7.4, and 7.3, which allows a user to gain elevated privileges. The vulnerability is classified under CWE-427.

Defensive priority

high

Recommended defensive actions

Apply patches or updates provided by IBM to fix the vulnerability.
Review and update system configurations to prevent exploitation.

Evidence notes

The vulnerability is documented in the CVE record [cve-org] and the NVD detail page [nvd]. IBM has also provided a support page [ref-4] for this issue.

Official resources

CVE-2026-7870 was published on 2026-06-11T16:16:25.220Z and modified on 2026-06-11T20:56:29.653Z.