How severe is CVE-2024-21646?

CVE-2024-21646 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-21646 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21646?

CVE-2024-21646 affects Microsoft Azure Uamqp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21646?

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

Does CVE-2024-21646 have an EU (EUVD) identifier?

Yes. CVE-2024-21646 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19279.

When was CVE-2024-21646 published?

CVE-2024-21646 was published on 2024-01-09 and last updated on 2026-06-17.

CVE-2024-21646

CVE-2024-21646 is a critical-severity vulnerability in Microsoft Azure Uamqp with a CVSS 3.x base score of 9.8. 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-190.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19279
Weakness: CWE-190
Affected product: Microsoft Azure Uamqp
Published: 2024-01-09
Last modified: 2026-06-17

Description

Azure uAMQP is a general purpose C library for AMQP 1.0. The UAMQP library is used by several clients to implement AMQP protocol communication. When clients using this library receive a crafted binary type data, an integer overflow or wraparound or memory safety issue can occur and may cause remote code execution. This vulnerability has been patched in release 2024-01-01.

Frequently asked questions

What is CVE-2024-21646?: Azure uAMQP is a general purpose C library for AMQP 1.0. The UAMQP library is used by several clients to implement AMQP protocol communication. When clients using this library receive a crafted binary type data, an integer overflow or wraparound or memory safety issue can occur and may cause remote code execution. This vulnerability has been patched in release 2024-01-01.
How severe is CVE-2024-21646?: CVE-2024-21646 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-21646 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21646?: CVE-2024-21646 affects Microsoft Azure Uamqp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21646?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-21646 have an EU (EUVD) identifier?: Yes. CVE-2024-21646 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19279.
When was CVE-2024-21646 published?: CVE-2024-21646 was published on 2024-01-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:azure_uamqp:*:*:*:*:*:*:*:*

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