# CVE-2026-118786: NXP MCUXpresso SDK improper input validation in NSC veneer functions

Source: https://junglewise.ai/threats/cve-2026-118786-improper-input-validation-in-non-secure-callable-nsc-veneer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-118786 · Severity: medium · CVSS 6.8 · Published 2026-11-06

The NXP MCUXpresso SDK is a development framework for embedded microcontrollers that includes security features for isolating sensitive code. A flaw in the rpmsg-lite multicore example allows untrusted application code to bypass security boundaries and access sensitive memory or crash the system. An attacker with code execution in the non-secure domain could extract cryptographic keys or other secrets from the secure world.

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

## Quick answers

**Is CVE-2026-118786 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-118786 being exploited in the wild.

**How severe is CVE-2026-118786?** Medium severity, with a CVSS score of 6.8, published 6 November 2026.

**Which products and versions are affected?** NXP MCUXpresso SDK up to 26.06.00-lts and 26.09.00.

**Is there a fix for CVE-2026-118786?** Yes: fixed in MCUXpresso SDK 26.06.01-lts, 26.12.00-pvw1 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-118786 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-118786?** Check whether you run NXP MCUXpresso SDK 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 MCUXpresso SDK 26.06.01-lts, 26.12.00-pvw1 and later

## Technical details

Improper input validation in non-secure-callable (NSC) veneer functions in the rpmsg-lite TrustZone-M example allows a non-secure caller to supply unvalidated pointers and size values, bypassing trust boundaries. An unprivileged non-secure application can trigger a timing side-channel, TOCTOU condition, or out-of-bounds memory access, leading to disclosure of secure-world memory or denial of service. The vulnerability requires code execution in the non-secure domain.

## Affected products

- NXP MCUXpresso SDK up to 26.06.00-lts and 26.09.00

## Timeline

- 2026-11-06: disclosed

## References

- [https://mcuxpresso.nxp.com/mcuxsdk/26.12.00-pvw1/release/index.html](https://mcuxpresso.nxp.com/mcuxsdk/26.12.00-pvw1/release/index.html)

## Related threats

- [NXP MCUXpresso SDK TrustZone-M NSC veneer input validation bypass](https://junglewise.ai/threats/cve-2026-118785-improper-handling-of-non-secure-world-input-in-nsc-veneer)