# CVE-2026-50652: Microsoft Azure Active Directory deserialization denial of service

Source: https://junglewise.ai/threats/cve-2026-50652-microsoft-azure-active-directory-deserialization-denial-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-50652 · Severity: high · CVSS 7.5 · Published 2026-07-14

A security vulnerability in Microsoft Azure Active Directory could allow an attacker to disrupt the service remotely. Azure Active Directory is a critical identity management service used by organizations to manage user logins and access to applications. An exploit could result in a denial-of-service, preventing legitimate users from accessing corporate resources and interrupting business operations.

Technologies: [Microsoft Azure Active Directory](https://junglewise.ai/threats/technologies/entra-id). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-50652 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50652 being exploited in the wild.

**How severe is CVE-2026-50652?** High severity, with a CVSS score of 7.5, published 14 July 2026.

**Which products and versions are affected?** Microsoft Azure Active Directory 2021 versions prior to 5.7.1.

**Is there a fix for CVE-2026-50652?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-50652 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-50652?** Check whether you run Microsoft Azure Active Directory at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A deserialization vulnerability (CWE-502) exists in Microsoft Azure Active Directory. The flaw stems from the service improperly processing untrusted data, which can be exploited by an unauthenticated attacker over the network. By sending a specially crafted request, an attacker can trigger a denial-of-service (DoS) condition, impacting the availability of the identity service. The vulnerability is addressed in version 5.7.1 of the affected component.

## Affected products

- Microsoft Azure Active Directory 2021 versions prior to 5.7.1

## Timeline

- 2026-07-14: disclosed
- 2026-07-14: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50652](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50652)

## Related threats

- [Microsoft Azure Active Directory information disclosure](https://junglewise.ai/threats/cve-2026-85916-exposure-of-private-personal-information-to-an-unauthorized-actor)
- [Microsoft Azure Active Directory SSRF privilege escalation](https://junglewise.ai/threats/cve-2026-69851-microsoft-azure-active-directory-ssrf-privilege-escalation)
- [Microsoft Azure Active Directory infinite loop denial of service](https://junglewise.ai/threats/cve-2026-50653-microsoft-azure-active-directory-infinite-loop-denial-of-service)