CVE-2026-6730 Multiple Vulnerabilities in IBM Concert Software

Critical 9.8 Published 23 Sep 2026 Updated 25 Sep 2026

A local attacker can exploit a buffer overflow in IBM Concert to execute arbitrary code on the system.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-6730?

CVE-2026-6730 is a critical memory corruption vulnerability in Ibm Concert, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-120

Which versions are affected by CVE-2026-6730?

It affects 1 product.

Products include Ibm Concert.

How do I fix CVE-2026-6730?

No fix has been published for CVE-2026-6730 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-6730 being exploited?

There is no known exploitation of CVE-2026-6730 in the wild and no public exploit code.

All Ibm Concert vulnerabilities

Sources

Also known as GHSA-9rqq-756h-2hmp.