EUVD-2026-43782Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Loop termination conditions
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Jul 14, 2026
Denial of service in Microsoft Azure Active Directory (Entra ID) allows a remote unauthenticated attacker to send network traffic that drives affected processing into an infinite loop (CWE-835), exhausting resources and disrupting availability of the identity service. The flaw carries CVSS 7.5 with a high-availability impact, no confidentiality or integrity effect, and no public exploit identified at time of analysis. Microsoft has released a fix, which for this cloud-hosted service is applied server-side by the vendor.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in microsoft, euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Know when Azure Active Directory gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
DescriptionCVE.org
Loop with unreachable exit condition ('infinite loop') in Azure Active Directory allows an unauthorized attacker to deny service over a network.
Executive ViewAI
Microsoft Azure Active Directory (Entra ID) is vulnerable to a denial-of-service attack that can disrupt authentication services organization-wide. An unauthenticated attacker can trigger an infinite loop in the identity service, exhausting resources and blocking all user authentication. This directly threatens business continuity, as Entra ID is the critical authentication backbone for most enterprise applications and systems.
Within 24 hours, verify with Microsoft that the patch has been deployed to your Azure AD/Entra ID tenant and confirm service health via the Azure Status Dashboard. Within 7 days, review Azure AD sign-in logs and network traffic for unusual patterns or repeated authentication failures that may indicate exploitation attempts, and validate your tenant has received the latest service updates. Within 30 days, document the remediation in your security inventory and update incident response procedures to include detection and alerting for identity service degradation.
Patch available and automatically deployed server-side by Microsoft. Azure AD/Entra ID cloud service requires no customer patching action. Implement monitoring for authentication service degradation and unusual sign-in traffic patterns to detect potential exploitation.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
More in Azure Active Directory
View allPrivilege elevation in Microsoft Azure Active Directory (Entra ID) lets an already-authenticated, low-privileged attacke
Privilege escalation in Microsoft Azure Active Directory allows unauthenticated remote attackers to bypass authenticatio
Denial of service in Microsoft Azure Active Directory (now Entra ID) allows a remote, unauthenticated attacker to disrup
An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as
Microsoft Azure Active Directory B2C Spoofing Vulnerability. Rated medium severity (CVSS 6.8), this vulnerability is rem
GitHub PoC
Exploit-DB