---
title: "CVE-2026-12665: IBM MQ - Remote Code Execution"
description: "IBM MQ contains a stack buffer overflow caused by processing TLS certificates with malformed distinguished names during channel connection establishment, letting remote attackers execute arbitrary code."
url: https://panop.io/threat-heartbeat/CVE-2026-12665/
---

# CVE-2026-12665 IBM MQ - Remote Code Execution

IBM MQ contains a stack buffer overflow caused by processing TLS certificates with malformed distinguished names during channel connection establishment, letting remote attackers execute arbitrary code.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-12665)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

19 October 2026

Updated

20 October 2026

Weakness

[CWE-121](https://cwe.mitre.org/data/definitions/121.html)

## Vendor fix

Update to the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-12665](https://nvd.nist.gov/vuln/detail/CVE-2026-12665)
- [https://www.ibm.com/support/pages/node/7292667](https://www.ibm.com/support/pages/node/7292667)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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