9.8

CVE-2026-6721: ibm concert OS Command Injection

CVSS: 9.8v3.1CriticalAnalyzed
Published 23-09-2026Last modified 25-09-2026
Open JSON

Vulnerability summary

CVE-2026-6721 is a critical (CVSS 9.8) OS Command Injection vulnerability in ibm concert. EPSS estimates a 1.45% chance of exploitation in the next 30 days, higher than 73.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
1.45%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 23-09-2026
    PublishedVulnerability first disclosed.
  2. 25-09-2026
    Last modifiedVulnerability information updated.

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.45%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

24-09-202622-10-2026
EPSS score
1.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ibm1 product

1 vendor · 1 product

References

1 links