How severe is CVE-2026-35435?

CVE-2026-35435 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-35435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-35435?

CVE-2026-35435 affects Microsoft Azure Ai Foundry. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-35435?

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-2026-35435 have an EU (EUVD) identifier?

Yes. CVE-2026-35435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28454.

When was CVE-2026-35435 published?

CVE-2026-35435 was published on 2026-05-07 and last updated on 2026-06-17.

CVE-2026-35435

CVE-2026-35435 is a high-severity vulnerability in Microsoft Azure Ai Foundry with a CVSS 3.x base score of 8.6. 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 8.6)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28454
Weakness: CWE-284
Affected product: Microsoft Azure Ai Foundry
Published: 2026-05-07
Last modified: 2026-06-17

Description

Improper access control in Azure AI Foundry M365 published agents allows an unauthorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2026-35435?: Improper access control in Azure AI Foundry M365 published agents allows an unauthorized attacker to elevate privileges over a network.
How severe is CVE-2026-35435?: CVE-2026-35435 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-35435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-35435?: CVE-2026-35435 affects Microsoft Azure Ai Foundry. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-35435?: 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-2026-35435 have an EU (EUVD) identifier?: Yes. CVE-2026-35435 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28454.
When was CVE-2026-35435 published?: CVE-2026-35435 was published on 2026-05-07 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35435

Affected products (1)

cpe:2.3:a:microsoft:azure_ai_foundry:-:*:*:*:*:*:*:*

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