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CVE-2026-17276 is a critical privilege-escalation vulnerability affecting IBM i and IBM i Navigator for i on versions 7.3, 7.4, 7.5, and 7.6. The flaw is caused by improper authorization in the handling of high-authority threads. A remote authenticated attacker with low privileges can exploit the authorization weakness to cause operations associated with high-authority execution contexts to be performed without proper enforcement of intended privilege boundaries. The issue is remotely exploitable and does not require user interaction. The vulnerability has been described with a CVSS v3.1 base score of 9.6.
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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.
A high-severity authorization management vulnerability in IBM i high-level threads that could allow an authenticated low-privileged user to gain elevated administrative privileges.
A critical privilege escalation vulnerability in IBM i Navigator for i caused by improper authorization in the handling of high-authority threads, allowing a remote authenticated attacker to escalate privileges.
A privilege escalation vulnerability in IBM i Navigator for i caused by improper authorization in handling high-authority threads.
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.