How severe is CVE-2023-48691?

CVE-2023-48691 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-48691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-48691?

CVE-2023-48691 affects Microsoft Azure Rtos Netx Duo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-48691?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-48691 published?

CVE-2023-48691 was published on 2023-12-05 and last updated on 2026-06-17.

CVE-2023-48691

CVE-2023-48691 is a high-severity vulnerability in Microsoft Azure Rtos Netx Duo with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Microsoft Azure Rtos Netx Duo
Published: 2023-12-05
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2023-48691?: CVE-2023-48691 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-48691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-48691?: CVE-2023-48691 affects Microsoft Azure Rtos Netx Duo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-48691?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-48691 published?: CVE-2023-48691 was published on 2023-12-05 and last updated on 2026-06-17.

References

https://github.com/azure-rtos/netxduo/security/advisories/GHSA-fwmg-rj6g-w99p

Affected products (1)

cpe:2.3:o:microsoft:azure_rtos_netx_duo:*:*:*:*:*:*:*:*

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CVE-2023-48316 — Critical (CVSS 9.8): Azure RTOS NetX Duo is a TCP/IP network stack designed specifically for deeply embedded real-time and IoT applications.…
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