Vulnerability · Published Oct 12, 2026 · Assigned by ibm
CVE-2026-81858IBM i is Affected By A Denial of Service Vulnerability in Host Servers
Medium 5.4
In plain English
A medium-severity out-of-bounds read in i from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 80.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IBM i 7.3, 7.4, 7.5, and 7.6 could allow a remote authenticated attacker to cause a denial of service and obtain information due to an out-of-bounds read in the File Server.
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
References
- https://www.ibm.com/support/pages/node/7290195 vendor-advisory, patch