CVE-2026-6928Network attack vector

Arbitrary code execution via use-after-free memory access

Published Sep 23, 2026 · Updated Sep 23, 2026

Use-after-free in IBM Concert 1.0.0 through 3.0.0 allows remote attackers to execute arbitrary code via crafted network input. IBM has not identified the affected component or disclosed how untrusted input reaches memory that remains referenced after release. No privileges or user interaction are required; successful exploitation can corrupt memory, crash the application, or execute code.

CVSS severity9.8
Critical
EPSS probability0.45%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in IBM Concert 1.0.0 through 3.0.0 allows remote attackers to execute arbitrary code via crafted network input. IBM has not identified the affected component or disclosed how untrusted input reaches memory that remains referenced after release. No privileges or user interaction are required; successful exploitation can corrupt memory, crash the application, or execute code.

The record

CVE
CVE-2026-6928
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
IBM
Product
Concert
Classifications
CWE-416, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <=3.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · Concertversion=1.0.0 <=3.0.0

Published CVSS scores

9.8IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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