CVE-2022-21919: Microsoft Windows User Profile Service Privilege Escalation Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 25 Apr 2022, 104 days after the CVE record was published.

How likely is exploitation in the next 30 days?

2.4%

EPSS score, percentile 84.2 of all scored records

How severe?

7.0 High

CVSS v3.1 base score, given by the CNA

What should I do?

Required action (CISA), due 16 May 2022: Apply updates per vendor instructions.

Advisories and patches (1)

Which versions are affected?

Affected: 10.0.17763.0 up to, not including, 10.0.17763.2452; 10.0.0 up to, not including, 10.0.17763.2452; 10.0.17763.0 up to, not including, 10.0.17763.2452; 10.0.17763.0 up to, not including, 10.0.17763.2452; 10.0.0 up to, not including, 10.0.18363.2037; 10.0.0 up to, not including, 10.0.19043.1466; 10.0.20348.0 up to, not including, 10.0.20348.469; 10.0.0 up to, not including, 10.0.19042.1466; 10.0.0 up to, not including, 10.0.19042.1466; 10.0.0 up to, not including, 10.0.22000.434; 10.0.19043.0 up to, not including, 10.0.19043.1466; 10.0.10240.0 up to, not including, 10.0.10240.19177; 10.0.14393.0 up to, not including, 10.0.14393.4886; 10.0.14393.0 up to, not including, 10.0.14393.4886; 10.0.14393.0 up to, not including, 10.0.14393.4886; 6.1.0 up to, not including, 6.1.7601.25829; 6.1.0 up to, not including, 6.1.7601.25829; 6.3.0 up to, not including, 6.3.9600.20246; 6.0.6003.0 up to, not including, 6.0.6003.21349; 6.0.6003.0 up to, not including, 6.0.6003.21349

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 16 May 2022.

Advisories and patches

• Windows User Profile Service Elevation of Privilege Vulnerability (Vendor advisory)

Linked from CISA's catalog entry

• https://nvd.nist.gov/vuln/detail/CVE-2022-21919

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Microsoft Windows User Profile Service contains an unspecified vulnerability that allows for privilege escalation.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2022-21919 to its Known Exploited Vulnerabilities (KEV) catalog on 25 Apr 2022.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 16 May 2022.
• The CVE record was published on 11 Jan 2022, 104 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 7.0 (High), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 2.4% (percentile 84.2), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Windows User Profile Service Elevation of Privilege Vulnerability

Windows User Profile Service Elevation of Privilege Vulnerability

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-59: Improper Link Resolution Before File Access ('Link Following')
• CWE-1386

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

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