What is CVE-2023-48691?

CVE-2023-48691 is a high-severity vulnerability in Azure-Rtos Netxduo, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2023-12-05.

How severe is CVE-2023-48691?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Azure-Rtos Netxduo

CVE-2023-48691

Azure RTOS NetX Duo is a TCP/IP network stack designed specifically for deeply embedded real-time and IoT applications. An attacker can cause an out-of-bounds write in Azure RTOS NETX Duo, that could lead to remote code execution. The affected components include process related to IGMP protocol in RTOS v6.2.1 and below. The fix has been included in NetX Duo release 6.3.0. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Vulnerability class: Buffer Overflow

Published 2023-12-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.031 (87.3th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.031 · newest: 0.031 · change: 0.000

Affected products

Azure-Rtos Netxduo — versions < 6.3.0
Microsoft Azure Rtos Netx Duo

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/azure-rtos/netxduo/security/advisories/GHSA-fwmg-rj6g-w99p (Third Party Advisory)

Frequently asked questions

What is CVE-2023-48691?: CVE-2023-48691 is a high-severity vulnerability in Azure-Rtos Netxduo, classified under Out-of-bounds Write. CVSS score: 8.1/10. Published 2023-12-05.
How severe is CVE-2023-48691?: High severity. CVSS v3 base score is 8.1 out of 10.