CVE-2026-35435: Azure AI Foundry Elevation of Privilege Vulnerability
CVE-2026-35435 is an elevation of privilege vulnerability in Azure AI Foundry, rated Critical by Microsoft, with a CVSS 3.1 base score of 8.6 (High). An attacker can exploit it remotely over the network, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild and rates exploitation as more likely. The EPSS model estimates a 1.16% probability of exploitation activity in the next 30 days, higher than 68% of all scored vulnerabilities. Microsoft published it on 7 May 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Azure).
Key facts
- CVE ID
- CVE-2026-35435
- Severity
- High CVSS 8.6
- Microsoft severity
- Critical
- Impact
- Elevation of Privilege
- Exploited in the wild
- No
- Publicly disclosed
- No
- Exploitation likelihood
- More Likely
- Weakness
- CWE-284
- EPSS
- 1.16% (percentile 68%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- May 2026 Patch Tuesday
- Product families
- Azure
CVSS score and vector
Microsoft scores CVE-2026-35435 at 8.6 (temporal 7.5) using CVSS 3.1. Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C
| Metric | Value |
|---|---|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Changed |
| Confidentiality impact | High |
| Integrity impact | None |
| Availability impact | None |
| Exploit code maturity | Unproven |
| Remediation level | Official fix |
| Report confidence | Confirmed |
Description
Improper access control in Azure AI Foundry M365 published agents allows an unauthorized attacker to elevate privileges over a network.
Frequently asked questions (Microsoft)
Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.
Affected products (1)
Azure
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| Azure AI Foundry |
NIST NVD data
- NVD status
- Analyzed
- NVD CVSS
- 8.6 (HIGH)
- NVD weakness
- CWE-284
- Published to NVD
- NVD last modified
Affected configurations (CPE)
| Product | Vulnerable versions |
|---|---|
| azure ai foundry | all listed versions |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35435 (Vendor Advisory)
Acknowledgments
- Anonymous
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. |