Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-81858

CVE-2026-81858HIGH

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

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  N  H    8.1   .0048   40.2     —

AFFECTED
  Product  Versions  Fixed
  i        7.6 –     —

TIMELINE
  Aug 27  Reserved by ibm
  Oct 12  Published (CNA: ibm)
  Oct 14  RESCORED — CVE-2026-81858 (IBM i). CVSS 5.4 → 8.1 (NVD).

CWE-125 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 27, 2026	Reserved	Reserved by ibm
October 12, 2026	Published	Published (CNA: ibm)
October 14, 2026	RESCORED	RESCORED — CVE-2026-81858 (IBM i). CVSS 5.4 → 8.1 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	i	—	7.6	—

Weaknesses

CWE-125

References (1)

https://www.ibm.com/support/pages/node/7290195 [Patch, Vendor Advisory]

Authoritative record: CVE-2026-81858 at cve.org

Vendors: ibm

Weaknesses: CWE-125

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-81858 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.