---
id: CVE-2025-12771
title: >-
  IBM Concert 1.0.0 through 2.1.0 is vulnerable to a stack-based buffer
  overflow, caused by improper bounds checking
summary: >-
  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.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-119
vendor: ibm
product: concert
affected:
  - 'concert >= 1.0.0, < 2.2.0'
patched:
  - concert 2.2.0
published: '2025-12-26'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T08:10:00.193'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-12771'
references:
  - url: 'https://www.ibm.com/support/pages/node/7255549'
    label: psirt@us.ibm.com
tags:
  - nvd
epss: 0.00163
epssPercentile: 0.04977
ingestedAt: '2026-10-06T08:50:17.382Z'
---

## Overview

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.

## Affected

- `concert >= 1.0.0, < 2.2.0`

## Remediation

Upgrade past the affected range:

- `concert 2.2.0`