November 13, 2026

CVE Watchtower

CVE-2021-36949Microsoft Azure Active Directory Connect Improper Authentication

NVDCVSS scored by secure@microsoft.com

Vulnerability Summary

Microsoft Azure Active Directory Connect Authentication Bypass Vulnerability
Severity Level
HIGH(7.1)
Published Date
Aug 12, 2021
Last Modified
Aug 10, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
1.39%Probability
Root Weakness (CWE)
CWE-287: Improper Authentication β†—
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
CVSS v3.1 Base Metrics — Score 7.1 (HIGH)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorAdjacent
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Microsoft Azure Active Directory Connect >= 1.3.20.0 and <= 1.6.11.3
  • Microsoft Azure Active Directory Connect >= 2.0.3.0 and <= 2.0.9.0
  • Microsoft Azure Active Directory Connect Provisioning Agent < 1.1.582.0
Patched Versions
  • Microsoft Azure Active Directory Connect Provisioning Agent 1.1.582.0

What to do

Plan remediation soon. No exploitation is confirmed yet, but the severity is high.

  1. Check whether you run Microsoft Azure Active Directory Connect and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Aug 12, 2021Published
  • Aug 10, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 13, 2026 21:28 UTC