# CVE-2025-12771: IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A…

Source: https://junglewise.ai/threats/cve-2025-12771-ibm-concert-1-0-0-through-2-1-0-is-vulnerable-to-a-stack-based  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-26  
License: CC BY 4.0 with a link back

CVE-2025-12771 · Severity: high · CVSS 7.8 · Published 2025-12-26

IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.

Technologies: [IBM Concert](https://junglewise.ai/threats/technologies/concert). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2025-12771 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-12771 being exploited in the wild.

**How severe is CVE-2025-12771?** High severity, with a CVSS score of 7.8, published 26 December 2025.

**Which products and versions are affected?** IBM Concert. The advisory does not name versions.

**Is there a fix for CVE-2025-12771?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-12771?** Check whether you run IBM Concert. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- IBM Concert

## Related threats

- [IBM Concert command injection vulnerability](https://junglewise.ai/threats/cve-2026-6715-ibm-concert-1-0-through-3-0-1-1-allows-an-attacker-can-supply)
- [IBM Concert arbitrary command execution in dependencies](https://junglewise.ai/threats/cve-2026-15266-ibm-concert-1-0-through-3-0-1-1-contains-components-that-allow)
- [IBM Concert weak cryptographic algorithms allow decryption](https://junglewise.ai/threats/cve-2026-6719-ibm-concert-1-0-through-3-0-0-uses-weaker-than-expected)
- [IBM Concert cross-site scripting in Web UI](https://junglewise.ai/threats/cve-2026-4413-ibm-concert-1-0-through-3-0-0-is-vulnerable-to-cross-site)
- [IBM Concert local web cache accessible to other users](https://junglewise.ai/threats/cve-2026-4405-ibm-concert-1-0-through-3-0-0-allows-web-page-cache-to-be-stored)