CVE-2026-18527
Unauthenticated remote privilege escalation in IBM Administration Runtime Expert for i.
Is CVE-2026-18527 being exploited?
Not confirmed. CVE-2026-18527 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-18527?
CVE-2026-18527 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-18527?
Yes. A fix has been recorded for CVE-2026-18527. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-18527 affect?
CVE-2026-18527 affects IBM Administration Runtime Expert for i 1R1M0, IBM Application Runtime Expert (ARE) for i. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-18527?
Apply IBM patch immediately; restrict ARE GUI access and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can act as other users on IBM i, gaining elevated privileges to access data, execute commands, and change configurations.
Immediate action required
- affected1R1M0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.