How severe is CVE-2024-21638?

CVE-2024-21638 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2024-21638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21638?

CVE-2024-21638 affects Microsoft Azure Ipam. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21638?

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-2024-21638 have an EU (EUVD) identifier?

Yes. CVE-2024-21638 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19276.

When was CVE-2024-21638 published?

CVE-2024-21638 was published on 2024-01-10 and last updated on 2026-06-17.

CVE-2024-21638

CVE-2024-21638 is a critical-severity vulnerability in Microsoft Azure Ipam with a CVSS 3.x base score of 9.1. 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19276
Weakness: CWE-287
Affected product: Microsoft Azure Ipam
Published: 2024-01-10
Last modified: 2026-06-17

Description

Azure IPAM (IP Address Management) is a lightweight solution developed on top of the Azure platform designed to help Azure customers manage their IP Address space easily and effectively. By design there is no write access to customers' Azure environments as the Service Principal used is only assigned the Reader role at the root Management Group level. Until recently, the solution lacked the validation of the passed in authentication token which may result in attacker impersonating any privileged user to access data stored within the IPAM instance and subsequently from Azure, causing an elevation of privilege. This vulnerability has been patched in version 3.0.0.

Frequently asked questions

What is CVE-2024-21638?: Azure IPAM (IP Address Management) is a lightweight solution developed on top of the Azure platform designed to help Azure customers manage their IP Address space easily and effectively. By design there is no write access to customers' Azure environments as the Service Principal used is only assigned the Reader role at the root Management Group level. Until recently, the solution lacked the validation of the passed in authentication token which may result in attacker impersonating any privileged user to access data stored within the IPAM instance and subsequently from Azure, causing an elevation of privilege. This vulnerability has been patched in version 3.0.0.
How severe is CVE-2024-21638?: CVE-2024-21638 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2024-21638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21638?: CVE-2024-21638 affects Microsoft Azure Ipam. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21638?: 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-2024-21638 have an EU (EUVD) identifier?: Yes. CVE-2024-21638 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19276.
When was CVE-2024-21638 published?: CVE-2024-21638 was published on 2024-01-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:azure_ipam:*:*:*:*:*:*:*:*

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