Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-18828

CVE-2026-18828HIGH

IBM AIX — Vulnerabilities in IBM AIX and PowerVM VIOS

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0037   28.2     —

AFFECTED
  Product       Versions  Fixed
  AIX           7.2 –     —
  PowerVM VIOS  4.1 –     —

TIMELINE
  Aug 4   Reserved by ibm
  Aug 20  Published (CNA: ibm)
  Aug 25  RESCORED — CVE-2026-18828 (IBM AIX). CVSS 5.4 → 7.5 (NVD).

CWE-787 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to a stack-based buffer overflow.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 4, 2026	Reserved	Reserved by ibm
August 20, 2026	Published	Published (CNA: ibm)
August 25, 2026	RESCORED	RESCORED — CVE-2026-18828 (IBM AIX). CVSS 5.4 → 7.5 (NVD).

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	AIX	—	7.2	—
IBM	PowerVM VIOS	—	4.1	—

Weaknesses

CWE-787

References (1)

https://www.ibm.com/support/pages/node/7283858 [Patch, Vendor Advisory]

Authoritative record: CVE-2026-18828 at cve.org

Vendors: ibm

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-18828 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 Sunday, October 4, 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.