Azure RTOS NetX Duo Remote Code Execution Vulnerability

published 2023-12-05 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-52372

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 4.3%; EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits: 0; none known

Azure RTOS NetX Duo is a TCP/IP network stack designed specifically for deeply embedded real-time and IoT applications. An attacker can cause remote code execution due to memory overflow vulnerabilities in Azure RTOS NETX Duo. The affected components include processes/functions related to snmp, smtp, ftp and dtls in RTOS v6.2.1 and below. The fixes have been included in NetX Duo release 6.3.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Patch / fix

fixed in 1

microsoft azure_rtos_netx_duo 6.3.0

Exploit prediction

4.33% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

azure-rtos netxduo

Classification

Weakness

CWE-787 Out-of-bounds Write
CWE-825 Expired Pointer Dereference

References

github.com /azure-rtos/netxduo/security/advisories/GHSA-3cmf-r288-xhwq
third-party-advisory

Sources

CVE List CVE-2023-48316
NVD CVE-2023-48316

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary