CVE-2026-6730
Ibm Concert: buffer overflow can lead to remote code execution
- Risk score
- 51/100
- CVSS
- 7.8 v3.1
- Exploit chance (30 days)
- 0.3%
- Published
- 23 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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.
- Affected
- Ibm Concert
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Story map
At a glance
Ibm Concert: Amber, patch this week. 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.
The flaws
- CVE-2026-6730: Buffer overflow can lead to remote code execution (CVSS 7.8 · EPSS 0%)
- CVE-2026-6721: OS command injection can lead to remote code execution (CVSS 9.8 · EPSS 1%)
- CVE-2026-6928: IBM Concert 1.0.0 through 3.0.0 references or accesses memory after it has been freed (CVSS 9.8 · EPSS 0%)
- CVE-2026-6719: IBM Concert 1.0 through 3.0.0 uses weaker than expected cryptographic algorithms that could allow… (CVSS 7.5 · EPSS 0%)
The fix
Fix: Apply the vendor's security update; see the linked advisory.
Who is exposed: Ibm Concert
Where it stands
- No known exploitation
Connects to
- Same weakness: Buffer overflow (CWE-120). 50 other warnings in 30 days
- Same product: Earlier Ibm Concert warnings. 13 in the last 90 days
Why it is Yellow
- CVSS 7.8 high
References
Original 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.
Last activity 23 Sep 2026. Patch Forecast updates every hour.