# CVE-2026-116488: NXP MCUXpresso SDK USB middleware heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-116488-nxp-mcuxpresso-sdk-usb-middleware-mcuxsdk-middleware-usb-before  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-116488 · Severity: medium · CVSS 6.8 · Published 2026-10-26

NXP's MCUXpresso SDK provides USB communication middleware used in embedded systems and microcontrollers. A heap buffer overflow in the USB host class drivers allows a malicious USB device to corrupt memory and potentially execute arbitrary code or cause a denial of service when connected to a system using the vulnerable middleware.

Vendors: [NXP](https://junglewise.ai/threats/vendors/nxp).

## Quick answers

**Is CVE-2026-116488 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116488 being exploited in the wild.

**How severe is CVE-2026-116488?** Medium severity, with a CVSS score of 6.8, published 26 October 2026.

**Which products and versions are affected?** NXP MCUXpresso SDK USB middleware before 2.13.0.

**Is there a fix for CVE-2026-116488?** Yes: fixed in 2.13.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116488 attacked?** It is attacked from the adjacent network, in a software library.

**Am I affected by CVE-2026-116488?** Check whether you run NXP MCUXpresso SDK USB middleware at an affected version. 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.

## How to fix

- Fixed in 2.13.0

## Technical details

The vulnerability is a heap buffer overflow in USB host audio, video, and CDC class drivers that fails to properly validate device-supplied bNumEndpoints and bLength descriptor values. When a crafted malicious USB device provides specially constructed descriptors, endpoint entries are written past the bounds of a fixed-size epList array, corrupting adjacent heap memory. This enables arbitrary code execution or denial of service depending on exploit conditions.

## Affected products

- NXP MCUXpresso SDK USB middleware before 2.13.0

## Timeline

- 2026-10-26: disclosed

## References

- [https://github.com/nxp-mcuxpresso/mcuxsdk-middleware-usb](https://github.com/nxp-mcuxpresso/mcuxsdk-middleware-usb)
- [https://github.com/nxp-mcuxpresso/mcuxsdk-middleware-usb/blob/release/26.06.00/host/class/usb_host_audio.c](https://github.com/nxp-mcuxpresso/mcuxsdk-middleware-usb/blob/release/26.06.00/host/class/usb_host_audio.c)

## Related threats

- [NXP MCUXpresso SDK USB middleware out-of-bounds read in RNDIS](https://junglewise.ai/threats/cve-2026-116487-nxp-mcuxpresso-sdk-usb-middleware-mcuxsdk-middleware-usb-before)