Microsoft Confirms Critical Entra ID Flaw Was Exploited, Says No Customer Action Needed

Key points

• Microsoft disclosed CVE-2026-69836, a remote code execution flaw in Entra ID, on Thursday and rated it 10.0 on the CVSS severity scale, the highest possible score.
• The company confirmed the bug had already been exploited in the wild before disclosure.
• Microsoft says no customer action is required because the fix was applied inside its cloud service.
• Entra ID, formerly known as Azure Active Directory, is the identity system that controls sign-ins for millions of business users of Microsoft 365 and Azure.
• The advisory did not name the attackers, the scope of exploitation, or the disclosure timeline.

Microsoft has confirmed that attackers exploited a critical flaw in Entra ID, the cloud service that handles employee logins for Microsoft 365, Azure and many linked business apps. The company disclosed the bug on Thursday and gave it the maximum severity score of 10.0.

The flaw is tracked as CVE-2026-69836. In plain terms, it allowed an attacker to run their own code on the service remotely, without needing to sit at a keyboard inside the target network.

Microsoft says customers do not need to do anything. The fix sits on Microsoft's side of the service, not on any software a customer installs. That is the trade-off with cloud identity: the vendor patches for you, but you also cannot patch it yourself.

What is Entra ID and why does this matter?

Entra ID is the system that decides who is allowed to sign in to a company's Microsoft cloud accounts. It was renamed from Azure Active Directory in 2023. If an attacker can run code inside that system, they are sitting next to the gate that decides which employees, contractors and apps get in.

A remote code execution bug in an identity service is roughly the worst class of cloud flaw, which is why the CVSS score, a 0-to-10 industry rating for how bad a vulnerability is, landed at the ceiling.

Was it actually exploited?

Yes. Microsoft's advisory, first reported by The Hacker News, states the vulnerability has been exploited in the wild. The company did not publish details on who the attackers were, how many tenants were affected, or when the exploitation began and ended.

That gap matters. Without a timeline, customers cannot check their own sign-in logs against a known window of malicious activity. Security teams will likely press Microsoft for indicators of compromise, meaning the technical fingerprints defenders use to search their own logs for signs of the same attacker.

The facts at a glance

Should ordinary users worry?

Probably not directly, but stay alert to sign-in prompts. If you use a work email that ends in a company domain and logs into Microsoft 365, your login sits inside Entra ID. You do not need to change your password because of this bug alone. Watch for unexpected multi-factor prompts on your phone in the coming weeks and report them to your IT team rather than approving them.

Businesses running Microsoft cloud services should still review their Entra ID sign-in logs and conditional access rules, the settings that decide which devices and locations can log in, for anything unusual over recent months. Microsoft saying "no action required" closes the patching question. It does not close the forensic one.

Common questions

Do I need to change my Microsoft password?

Not because of this specific bug. Microsoft applied the fix inside its own service. Change your password if your IT team tells you to, or if you see sign-in activity you do not recognise.

How is a cloud bug patched without customers doing anything?

Entra ID runs on Microsoft's servers, not on computers inside your office. When Microsoft updates the code on its side, every customer gets the fix at the same moment.