Is CVE-2022-36063 actively exploited?

No active exploitation of CVE-2022-36063 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-36063 be exploited remotely?

Yes. CVE-2022-36063 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-36063?

CVE-2022-36063 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-36063

CWE-121Published: October 10, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Azure RTOS USBx is a USB host, device, and on-the-go (OTG) embedded stack, fully integrated with Azure RTOS ThreadX and available for all Azure RTOS ThreadX–supported processors. Azure RTOS USBX implementation of host support for USB CDC ECM includes an integer underflow and a buffer overflow in the `_ux_host_class_cdc_ecm_mac_address_get` function which may be potentially exploited to achieve remote code execution or denial of service. Setting mac address string descriptor length to a `0` or `1` allows an attacker to introduce an integer underflow followed (string_length) by a buffer overflow of the `cdc_ecm -> ux_host_class_cdc_ecm_node_id` array. This may allow one to redirect the code execution flow or introduce a denial of service. The fix has been included in USBX release [6.1.12](https://github.com/azure-rtos/usbx/releases/tag/v6.1.12_rel). Improved mac address string descriptor length validation to check for unexpectedly small values may be used as a workaround.

NVD Source

Risk Analysis

Azure RTOS USBx contains an integer underflow and buffer overflow in the USB host class, which could lead to remote code execution or denial of service. This is a critical risk for embedded systems using this stack.

No public exploit is known, and it is not in the CISA KEV. It is remotely exploitable with low complexity.

Recommended Action

Users should update to USBX release 6.1.12 or later to address the vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-36063 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.