CVE-2021-36948

HIGHNVD 7.89.0▲Trending — 5 sources updated this weekExploited in the wild

7.8

Windows Update Medic Service Elevation of Privilege Vulnerability

CVSS v3: 7.8
EG Score: 9.0(high)
EPSS: 77.9%
KEV: ⚠ Exploited

Published

August 12, 2021

Last Modified

October 30, 2025

Advisory Details (2)

Auto-updated Jun 4, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36948

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36948

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-269Improper Privilege Management

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2021-369482021-08-10
Windows Update Medic Service Elevation of Privilege Vulnerability

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 10:27 UTCEG score recompute
2026-06-06 10:27 UTCVendor advisory
2026-06-06 10:27 UTCGHSA enrichment
2026-06-06 06:30 UTCEG score recompute
2026-06-06 06:30 UTCVendor advisory
2026-06-06 06:30 UTCGHSA enrichment
2026-06-06 02:33 UTCEG score recompute
2026-06-06 02:33 UTCVendor advisory
2026-06-06 02:33 UTCGHSA enrichment
2026-06-05 22:45 UTCepss_batch
2026-06-05 22:43 UTCkev_newly_listed
2026-06-05 22:36 UTCEG score recompute
2026-06-05 22:36 UTCVendor advisory
2026-06-05 22:36 UTCGHSA enrichment
2026-06-05 18:39 UTCEG score recompute
2026-06-05 18:39 UTCVendor advisory
2026-06-05 18:39 UTCGHSA enrichment
2026-06-05 14:42 UTCEG score recompute
2026-06-05 14:42 UTCVendor advisory
2026-06-05 14:42 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2021-36948?

CVE-2021-36948 is a high vulnerability published on August 12, 2021. Windows Update Medic Service Elevation of Privilege Vulnerability

When was CVE-2021-36948 disclosed?

CVE-2021-36948 was first published in the National Vulnerability Database on August 12, 2021, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-36948 actively exploited?

Yes. CISA added CVE-2021-36948 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2021-36948?

CVE-2021-36948 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2021-36948?

CVE-2021-36948 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-36948?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-36948, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-36948

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Is Your Infrastructure Affected by CVE-2021-36948?

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CVE-2021-36948

HIGHNVD 7.89.0▲Trending — 5 sources updated this weekExploited in the wild

Frequently asked(6)

What is CVE-2021-36948?

CVE-2021-36948 is a high vulnerability published on August 12, 2021. Windows Update Medic Service Elevation of Privilege Vulnerability

When was CVE-2021-36948 disclosed?

Is CVE-2021-36948 actively exploited?

What is the CVSS score of CVE-2021-36948?

CVE-2021-36948 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2021-36948?

CVE-2021-36948 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-36948?

CVE-2021-36948

Published

Last Modified

Advisory Details (2)

Known Exploited Vulnerabilities Catalog | CISA

Security Update Guide - Microsoft Security Response Center

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36948?

CVE-2021-36948

Published

Last Modified

Advisory Details (2)

Known Exploited Vulnerabilities Catalog | CISA

Security Update Guide - Microsoft Security Response Center

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36948?

Same vendor

Same CWE

CVE-2021-36948

📅 Published

🔄 Last Modified

📋 Advisory Details (2)

Known Exploited Vulnerabilities Catalog | CISA

Security Update Guide - Microsoft Security Response Center

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36948?

CVE-2021-36948

📅 Published

🔄 Last Modified

📋 Advisory Details (2)

Known Exploited Vulnerabilities Catalog | CISA

Security Update Guide - Microsoft Security Response Center

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-36948?

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Frequently asked(6)

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