Exploitation evidence
Known exploited · CISA KEV listed
Added 2022-01-21. Ransomware campaign use: Known.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-07-21. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Microsoft / Windows 7
Default status: Not specified
- affected: 32-bit Systems Service Pack 1
- affected: x64-based Systems Service Pack 1
Microsoft / Windows Server 2012 R2
Default status: Not specified
- affected: (Server Core installation)
Microsoft / Windows RT 8.1
Default status: Not specified
- affected: Windows RT 8.1
Microsoft / Windows Server 2008
Default status: Not specified
- affected: 32-bit Systems Service Pack 2
- affected: 32-bit Systems Service Pack 2 (Server Core installation)
- affected: Itanium-Based Systems Service Pack 2
- affected: x64-based Systems Service Pack 2
- affected: x64-based Systems Service Pack 2 (Server Core installation)
Microsoft / Windows Server 2019
Default status: Not specified
- affected: (Server Core installation)
Microsoft / Windows Server 2012
Default status: Not specified
- affected: (Server Core installation)
Microsoft / Windows 8.1
Default status: Not specified
- affected: 32-bit systems
- affected: x64-based systems
Microsoft / Windows Server 2016
Default status: Not specified
- affected: (Server Core installation)
Microsoft / Windows Server 2008 R2
Default status: Not specified
- affected: Itanium-Based Systems Service Pack 1
- affected: x64-based Systems Service Pack 1
- affected: x64-based Systems Service Pack 1 (Server Core installation)
Microsoft / Windows 10
Default status: Not specified
- affected: 32-bit Systems
- affected: Version 1607 for 32-bit Systems
- affected: Version 1607 for x64-based Systems
- affected: Version 1703 for 32-bit Systems
- affected: Version 1703 for x64-based Systems
- affected: Version 1709 for 32-bit Systems
- affected: Version 1709 for x64-based Systems
- affected: Version 1803 for 32-bit Systems
- affected: Version 1803 for x64-based Systems
- affected: Version 1809 for 32-bit Systems
- affected: Version 1809 for x64-based Systems
- affected: x64-based Systems
Microsoft / Windows 10 Servers
Default status: Not specified
- affected: version 1709 (Server Core Installation)
- affected: version 1803 (Server Core Installation)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- http://www.securitytracker.com/id/1041828
- https://securelist.com/cve-2018-8453-used-in-targeted-attack
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8453
- http://www.securityfocus.com/bid/105467
- http://packetstormsecurity.com/files/153669/Microsoft-Windows-NtUserSetWindowFNID-Win32k-User-Callback.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8453
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.70042,
"percentile": 0.99386
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.70042,
"percentile": 0.99383
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.70042,
"percentile": 0.99381
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.70042,
"percentile": 0.99381
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.70042,
"percentile": 0.99381
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.70042,
"percentile": 0.9938
}06 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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{
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{
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},
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"datePublished": "2018-10-10T13:00:00.000Z",
"dateReserved": "2018-03-14T00:00:00.000Z",
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}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.70042,
"percentile": 0.99379
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.70042,
"percentile": 0.99378
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.70042,
"percentile": 0.99377
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.70042,
"percentile": 0.99376
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2018-8453",
"cwes": [
"CWE-404"
],
"dateAdded": "2022-01-21",
"dueDate": "2022-07-21",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2018-8453",
"product": "Win32k",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Microsoft Windows Win32k contains a vulnerability that allows an attacker to escalate privileges.",
"vendorProject": "Microsoft",
"vulnerabilityName": "Microsoft Win32k Privilege Escalation Vulnerability"
}