Quick answers
- Is CVE-2026-17073 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-17073 being exploited in the wild.
- How severe is CVE-2026-17073?
- Medium severity, with a CVSS score of 5.4, published 16 October 2026.
- Which products and versions are affected?
- IBM I 7.3, 7.4, 7.5, 7.6.
- Is there a fix for CVE-2026-17073?
- Yes: fixed in IBM i 7.6 PTF SJ11753, 7.5 PTF SJ11790, 7.4 PTF SJ11802, 7.3 PTF SJ11804. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-17073 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-17073?
- Check whether you run IBM I at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: IBM i 7.6 PTF SJ11753, 7.5 PTF SJ11790, 7.4 PTF SJ11802, 7.3 PTF SJ11804
Technical details
The vulnerability exists in IBM i's NFS file handle resolution logic, which fails to validate subtree access controls during file operations. A local, authenticated attacker can bypass authorization checks to read sensitive files outside their permitted scope. The flaw affects NFS file sharing across IBM i 7.3 through 7.6 and requires local access with valid user privileges.
Affected products
- IBM i 7.3, 7.4, 7.5, 7.6
Timeline
- 2026-10-14: disclosed