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CVE-2026-16904 is a high-severity improper privilege management vulnerability affecting IBM i versions 7.3, 7.4, 7.5, and 7.6, including Navigator for i. The flaw occurs during monitor owner reassignment, where privilege handling is not correctly enforced. A remote authenticated attacker with low privileges can exploit this condition to cause arbitrary command execution on the underlying IBM i system. The issue is remotely exploitable, requires authentication, and does not require user interaction.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An improper privilege management vulnerability in IBM i during monitor ownership changes that could allow a local user to execute arbitrary system commands.
An improper privilege management vulnerability in IBM i Navigator for i that could allow a remote authenticated attacker to execute arbitrary commands during monitor owner reassignment.
An improper privilege management vulnerability in IBM i Navigator for i that could allow a remote authenticated attacker to execute arbitrary commands.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.