What is the CVSS score of CVE-2021-38645?

CVE-2021-38645 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 1.9%.

Is CVE-2021-38645 being actively exploited?

Yes, CVE-2021-38645 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

Is there a patch available for CVE-2021-38645?

Yes, a patch is available for CVE-2021-38645. Update the affected software to the latest version immediately.

System Center Operations Manager CVE-2021-38645

HIGH

2021-09-15 secure@microsoft.com

Information Disclosure Microsoft System Center Operations Manager Azure Stack Hub Azure Automation State Configuration Azure Automation Update Management Azure Diagnostics Lad Azure Open Management Infrastructure Azure Security Center Azure Sentinel Container Monitoring Solution Log Analytics Agent

7.8

CVSS 3.1 · Vendor: microsoft

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Vulnerability Assessment

Impact	CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the high-severity affected system.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 1.9% exploitation probability (EPSS)

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AnalysisAI

Open Management Infrastructure Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Open Management Infrastructure Elevation of Privilege Vulnerability Affected products include: Microsoft Azure Automation State Configuration, Microsoft Azure Automation Update Management, Microsoft Azure Diagnostics \(Lad\), Microsoft Azure Open Management Infrastructure, Microsoft Azure Security Center.

Severity by source

Vendor (microsoft) PRIMARY 7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Sep 15, 2021 - 12:15 cve.org

HIGH 7.8

DescriptionCVE.org

Open Management Infrastructure Elevation of Privilege Vulnerability

Threat Intelligence Overview

EPSS Score

1.9%

Top 23% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

CISA KEV

EPSS

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.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC No

EPSS 1.9%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

High

Priority Score

Low Medium High Critical

KEV: +50

EPSS: +2

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:microsoft:azure_automation_state_configuration:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:azure_automation_update_management:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:azure_diagnostics_\(lad\):-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:azure_open_management_infrastructure:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:azure_security_center:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:azure_sentinel:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:azure_stack_hub:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:container_monitoring_solution:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:log_analytics_agent:-:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:system_center_operations_manager:-:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38645 REF https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38645 REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38645

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