CVE-2026-50652 Azure Active Directory Denial of Service Vulnerability

What is CVE-2026-50652?

CVE-2026-50652 is a high-severity unsafe deserialization vulnerability in Microsoft .Net Framework, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Deserialization of untrusted data in Azure Active Directory allows an unauthorized attacker to deny service over a network.

Weakness: CWE-502

Which versions are affected by CVE-2026-50652?

It affects 2 products.

Products include Microsoft .Net Framework, Microsoft Azure Active Directory.

How do I fix CVE-2026-50652?

No fix has been published for CVE-2026-50652 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-50652 being exploited?

There is no known exploitation of CVE-2026-50652 in the wild and no public exploit code.

Other vulnerabilities in Microsoft .Net Framework

• CVE-2020-0646 Microsoft .NET Framework Remote Code Execution Exploited Critical 9.8
• CVE-2017-8759 Microsoft .NET Framework Remote Code Execution Exploited High 7.8
• CVE-2015-1671 Microsoft Windows Remote Code Execution Exploited High 7.8
• CVE-2024-29059 Microsoft .NET Framework Information Disclosure Exploited High 7.5
• CVE-2014-4073 Privilege escalation in n/a Critical 10.0

All Microsoft .Net Framework vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-79fq-78m6-5rrm.