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CVE-2026-6721

IBM Concert remote code execution

9.8 CRITICALEPSS 1.45%
  1. Published23 Sept 2026

Description

IBM Concert 1.0.0 through 3.0.0 allows an unauthenticated remote attacker can supply specially crafted input that is incorporated into OS commands, resulting in arbitrary command execution on the underlying system. Successful exploitation allows remote code execution with the privileges of the affected application.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

IBM Concert≥ 1.0.0 ≤ 3.0.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-6721 being actively exploited?

CVE-2026-6721 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.45%.

How severe is CVE-2026-6721?

CVE-2026-6721 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.45% probability of exploitation.

Which products are affected by CVE-2026-6721?

Affected products include IBM Concert.

How do I fix CVE-2026-6721?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-6721 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.