IBM i is Affected By A Denial of Service Vulnerability in Host Servers

published 2026-10-12 27 d ago modified 2026-10-14 25 d ago also EUVD-2026-98178

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

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.

Patch / fix

links 1

ibm.com/support/pages/node/7290195 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 26 d ago (2026-10-13)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

IBM i

Classification

Weakness

CWE-125 Out-of-bounds Read

References

ibm.com /support/pages/node/7290195
vendor-advisory, patch

Sources

CVE List CVE-2026-81858
NVD CVE-2026-81858

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary