Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-6730

CVE-2026-6730HIGH

IBM Concert — Multiple Vulnerabilities in IBM Concert Software

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0030   21.0     —

AFFECTED
  Product  Versions  Fixed
  Concert  1.0.0 –   —

TIMELINE
  Apr 20  Reserved by ibm
  Sep 23  Published (CNA: ibm)
  Sep 28  RESCORED — CVE-2026-6730 (IBM Concert). CVSS 9.8 → 7.8 (NVD).

CWE-120 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

IBM Concert 1.0.0 through 3.0.0 is vulnerable to a buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
April 20, 2026	Reserved	Reserved by ibm
September 23, 2026	Published	Published (CNA: ibm)
September 28, 2026	RESCORED	RESCORED — CVE-2026-6730 (IBM Concert). CVSS 9.8 → 7.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	Concert	—	1.0.0	—

Weaknesses

CWE-120

References (1)

https://www.ibm.com/support/pages/node/7288830 [Vendor Advisory]

Authoritative record: CVE-2026-6730 at cve.org

Vendors: ibm

Weaknesses: CWE-120

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-6730 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 Saturday, October 3, 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.