Microsoft Azure Active Directory Connect Authentication Bypass Vulnerability
Summary
| CVE | CVE-2021-36949 |
|---|---|
| State | PUBLISHED |
| Assigner | microsoft |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-08-12 18:15:10 UTC |
| Updated | 2026-08-10 16:18:02 UTC |
| Description | Microsoft Azure Active Directory Connect Authentication Bypass Vulnerability |
Risk And Classification
Primary CVSS: v3.1 7.1 HIGH from [email protected]
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.013900000 probability, percentile 0.697650000 (date 2026-08-11)
Problem Types: CWE-287 | Elevation of Privilege
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.1 | HIGH | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | [email protected] | Secondary | 7.1 | HIGH | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 7.1 | HIGH | CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C |
| 2.0 | [email protected] | Primary | 4.9 | AV:A/AC:M/Au:S/C:P/I:P/A:P |
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
HighPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
AdjacentAccess Complexity
MediumAuthentication
SingleConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:A/AC:M/Au:S/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Microsoft | Azure Active Directory Connect | All | All | All | All |
| Application | Microsoft | Azure Active Directory Connect | All | All | All | All |
| Application | Microsoft | Azure Active Directory Connect Provisioning Agent | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Microsoft | Azure Active Directory Connect Provisioning Agent | affected 1.1.0.0 1.1.582.0 custom | Not specified |
| CNA | Microsoft | Microsoft Azure Active Directory Connect 1.X.Y.Z | affected 1.0.0.0 1.6.11.3 custom | Not specified |
| CNA | Microsoft | Microsoft Azure Active Directory Connect 2.0.X.Y | affected 2.0.0.0 2.0.8.0 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36949 | [email protected] | msrc.microsoft.com | |
| Security Update Guide - Microsoft Security Response Center | af854a3a-2127-422b-91ae-364da2661108 | portal.msrc.microsoft.com | Patch, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 91806 Microsoft Azure Active Directory Connect Authentication Bypass Vulnerability August 2021