Quick answers
- Is CVE-2026-45480 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-45480 being exploited in the wild.
- How severe is CVE-2026-45480?
- Critical severity, with a CVSS score of 10, published 19 June 2026.
- Which products and versions are affected?
- Microsoft Entra ID All versions.
- Is there a fix for CVE-2026-45480?
- 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-2026-45480 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-45480?
- Check whether you run Microsoft Entra ID 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
An improper authentication vulnerability (CWE-287) exists in Azure Active Directory (now Microsoft Entra ID). The flaw allows a remote, unauthenticated attacker to bypass security checks and elevate their privileges to a higher level, potentially gaining full administrative access. The attack vector is network-based and requires no user interaction or prior credentials. According to the CVSS 3.1 score of 10.0, the vulnerability has a 'Changed' scope, indicating that an exploit could impact resources beyond the identity provider itself, such as integrated cloud services and applications. Microsoft has addressed this in their hosted service environment.
Affected products
- Microsoft Azure Active Directory (Entra ID) All versions
Timeline
- 2026-06-19: disclosed
- 2026-06-19: advisory: Microsoft published the security update guide entry.