CVE-2019-0863

CVE-2019-0863 is a high-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03).

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• CVSS v2: 7.2
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
• EU (EUVD) id: EUVD-2019-1612
• EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
• Affected product: Microsoft Windows 10 1507
• Published: 2019-05-16
• Last modified: 2026-06-17

Description

An elevation of privilege vulnerability exists in the way Windows Error Reporting (WER) handles files, aka 'Windows Error Reporting Elevation of Privilege Vulnerability'.

Frequently asked questions

What is CVE-2019-0863?

An elevation of privilege vulnerability exists in the way Windows Error Reporting (WER) handles files, aka 'Windows Error Reporting Elevation of Privilege Vulnerability'.

How severe is CVE-2019-0863?

CVE-2019-0863 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-0863 being actively exploited?

Yes. CVE-2019-0863 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2019-0863?

CVE-2019-0863 primarily affects Microsoft Windows 10 1507. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-0863?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2019-0863 have an EU (EUVD) identifier?

Yes. CVE-2019-0863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-1612. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2019-0863 published?

CVE-2019-0863 was published on 2019-05-16 and last updated on 2026-06-17.

References

• http://packetstormsecurity.com/files/153008/Angry-Polar-Bear-2-Microsoft-Windows-Error-Reporting-Local-Privilege-Escalation.html
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0863
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-0863

Affected products (29)

• cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:*
• cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:*
• cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_1803:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*
• cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
• cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
• cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

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