CVE-2019-0863

Exp

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

Published: 2019-05-16 Last update: 2025-10-29 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-0863 is rated Critical Active Threat (87.8/100): CVSS High severity, with high exploitation likelihood (EPSS 6.16%, 91th percentile). CISA KEV confirms active exploitation (added 2021-11-03) affecting Microsoft / Windows. Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2019-0863

Name: Microsoft Windows Error Reporting (WER) Privilege Escalation Vulnerability · CISA KEV detail

Exploit added: 2021-11-03

Action due: 2022-05-03

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2019-0863

EDB-ID Source Kind Published Link
46917 exploit_db edb 2019-05-22 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-0863

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-16 6.40% 6.16% -0.23%
2 2026-03-01 6.51% 6.40% -0.12%
3 2026-02-08 — 6.51% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-0863

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2019-0863

Affected software / configurations for CVE-2019-0863

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

References for CVE-2019-0863

cvelogic Threat Intelligence