How severe is CVE-2025-59273?

CVE-2025-59273 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-59273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59273?

CVE-2025-59273 affects Microsoft Azure Event Grid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59273?

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.

Does CVE-2025-59273 have an EU (EUVD) identifier?

Yes. CVE-2025-59273 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35745.

When was CVE-2025-59273 published?

CVE-2025-59273 was published on 2025-10-23 and last updated on 2026-06-17.

CVE-2025-59273

CVE-2025-59273 is a high-severity vulnerability in Microsoft Azure Event Grid with a CVSS 3.x base score of 7.3. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.3)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35745
Weakness: CWE-284
Affected product: Microsoft Azure Event Grid
Published: 2025-10-23
Last modified: 2026-06-17

Description

Improper access control in Azure Event Grid allows an unauthorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2025-59273?: Improper access control in Azure Event Grid allows an unauthorized attacker to elevate privileges over a network.
How severe is CVE-2025-59273?: CVE-2025-59273 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-59273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59273?: CVE-2025-59273 affects Microsoft Azure Event Grid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59273?: 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.
Does CVE-2025-59273 have an EU (EUVD) identifier?: Yes. CVE-2025-59273 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35745.
When was CVE-2025-59273 published?: CVE-2025-59273 was published on 2025-10-23 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59273

Affected products (1)

cpe:2.3:a:microsoft:azure_event_grid:-:*:*:*:*:*:*:*

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