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CVE-2021-36942Windows LSA Spoofing Vulnerability

Windows LSA Spoofing Vulnerability

7.5 HIGHEPSS 66.02%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-08-10 20:19 UTC

OverviewCVSS details

7.5HIGHCVSS 3.1

Score source: microsoft (CNA)
NVD status: Analyzed
Published: Aug 12, 2021
Assigner: microsoft

Affected

Windows Server 2008 R2 Service Pack 1 (Microsoft)

Versions: 6.1.7601.0 before 6.1.7601.25685
Fixed in: 6.1.7601.25685

+13 more products →

Exploitation

Public exploit: Yes · 1 reference
CISA KEV: Listed · Nov 3, 2021
KEV due date: Nov 17, 2021
Ransomware use: Known
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

66.02%chance of exploitation in 30 days

Higher than 99.27% of CVEs

CVSS 3.1 · microsoft (CNA)

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: None

CVSS 3.1 · NVD

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: High
Availability impact: None

CVSS 3.1 · microsoft (CNA)

7.5High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: None

CVSS 2.0 · NVD

5.0Medium

AV:N/AC:L/Au:N/C:N/I:P/A:N

Attack vector: Network
Attack complexity: Low
Authentication: None
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

NVD status: Analyzed

Overview Affected Products References

Overview

Severity

Score	Severity	Version	Vector String
7.5	HIGH	3.1microsoft (CNA)	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5	HIGH	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5	HIGH	3.1microsoft (CNA)	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C
5.0	MEDIUM	2.0NVD	AV:N/AC:L/Au:N/C:N/I:P/A:N

CISA required action

⚡ Known exploited · remediation due Nov 17, 2021

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Details

CVE ID: CVE-2021-36942
Status: Analyzed
Assigner (CNA): microsoft
Published: Aug 12, 2021
Last modified: 2026-08-10 20:19 UTC
Weaknesses: CWE-749

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 11:18 UTC.