CASCACascade Atlas

Evidence dossier

CVE-2018-8453

CVE-2018-8453

74.7–91.2Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

State
PUBLISHED
Published
Oct 10, 2018
Updated
Oct 21, 2025
Evidence coverage
85%
CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS69.83%

2026-07-18 · v2026.06.15 · percentile 99.3%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

microsoftoriginal assertion
container

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

CISA KEVoriginal assertion
observed_exploitation

Microsoft Win32k Privilege Escalation Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.698330000000; percentile 0.992960000000

Applicability

Cited product scope

Trace impact →
MicrosoftWindows 10
[{"status": "affected", "version": "32-bit Systems"}, {"status": "affected", "version": "Version 1607 for 32-bit Systems"}, {"status": "affected", "version": "Version 1607 for x64-based Systems"}, {"status": "affected", "version": "Version 1703 for 32-bit Systems"}, {"status": "affected", "version": "Version 1703 for x64-based Systems"}, {"status": "affected", "version": "Version 1709 for 32-bit Systems"}, {"status": "affected", "version": "Version 1709 for x64-based Systems"}, {"status": "affected", "version": "Version 1803 for 32-bit Systems"}, {"status": "affected", "version": "Version 1803 for x64-based Systems"}, {"status": "affected", "version": "Version 1809 for 32-bit Systems"}, {"status": "affected", "version": "Version 1809 for x64-based Systems"}, {"status": "affected", "version": "x64-based Systems"}]unknown
MicrosoftWindows 10 Servers
[{"status": "affected", "version": "version 1709 (Server Core Installation)"}, {"status": "affected", "version": "version 1803 (Server Core Installation)"}]unknown
MicrosoftWindows 7
[{"status": "affected", "version": "32-bit Systems Service Pack 1"}, {"status": "affected", "version": "x64-based Systems Service Pack 1"}]unknown
MicrosoftWindows 8.1
[{"status": "affected", "version": "32-bit systems"}, {"status": "affected", "version": "x64-based systems"}]unknown
MicrosoftWindows RT 8.1
[{"status": "affected", "version": "Windows RT 8.1"}]unknown
MicrosoftWindows Server 2008
[{"status": "affected", "version": "32-bit Systems Service Pack 2"}, {"status": "affected", "version": "32-bit Systems Service Pack 2 (Server Core installation)"}, {"status": "affected", "version": "Itanium-Based Systems Service Pack 2"}, {"status": "affected", "version": "x64-based Systems Service Pack 2"}, {"status": "affected", "version": "x64-based Systems Service Pack 2 (Server Core installation)"}]unknown
MicrosoftWindows Server 2008 R2
[{"status": "affected", "version": "Itanium-Based Systems Service Pack 1"}, {"status": "affected", "version": "x64-based Systems Service Pack 1"}, {"status": "affected", "version": "x64-based Systems Service Pack 1 (Server Core installation)"}]unknown
MicrosoftWindows Server 2012
[{"status": "affected", "version": "(Server Core installation)"}]unknown
MicrosoftWindows Server 2012 R2
[{"status": "affected", "version": "(Server Core installation)"}]unknown
MicrosoftWindows Server 2016
[{"status": "affected", "version": "(Server Core installation)"}]unknown
MicrosoftWindows Server 2019
[{"status": "affected", "version": "(Server Core installation)"}]unknown
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_1709:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_1803:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

7.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.2
nvd@nist.govCVSS 2.0 · role PrimaryAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.