Quick answers
- Is CVE-2026-42901 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42901 being exploited in the wild.
- How severe is CVE-2026-42901?
- Critical severity, with a CVSS score of 10, published 22 May 2026.
- Which products and versions are affected?
- Microsoft Entra ID.
- Is there a fix for CVE-2026-42901?
- 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-2026-42901 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-42901?
- Check whether you run Microsoft Entra ID. 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
Microsoft Entra ID is vulnerable to a privilege escalation flaw due to an origin validation error (CWE-346). The vulnerability allows a remote, unauthenticated attacker to bypass security boundaries and gain elevated permissions within the directory service. According to the CVSS 3.1 vector, the attack is low complexity, requires no user interaction, and has a 'Changed' scope, indicating the attacker can impact components beyond the immediate security scope of the vulnerable service. As this is an exclusively hosted service, Microsoft typically manages the deployment of fixes on the backend.
Affected products
- Microsoft Entra ID
Timeline
- 2026-05-22: disclosed
- 2026-05-22: advisory: MSRC advisory published