What it is
CVE-2018-8653 is an unauthenticated vulnerability affecting Microsoft Internet Explorer 9 and 2 other products. A remote code execution vulnerability exists in the way that the scripting engine handles objects in...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2018-8653
Internet Explorer 9 Remote Code Execution
Microsoft / Internet Explorer 9 · Windows Server 2008 for 32-bit Systems Service Pack 2
- Severity
- CVSS 7.5 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 24.3%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Microsoft / Internet Explorer 9 windows server 2008 for 32-bit systems service pack 2.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Internet Explorer 9 Remote Code Execution
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.
This CVE ID is unique from CVE-2018-8643.
Vendor
Product
Affected
Status
Microsoft
Internet Explorer 9
Windows Server 2008 for 32-bit Systems Service Pack 2
Affected
Microsoft
Internet Explorer 9
Windows Server 2008 for x64-based Systems Service Pack 2
Affected
Microsoft
Internet Explorer 11
Windows 10 for 32-bit Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 for x64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1607 for 32-bit Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1607 for x64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1703 for 32-bit Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1703 for x64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1709 for 32-bit Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1709 for ARM64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1709 for x64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1803 for 32-bit Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1803 for ARM64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1803 for x64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1809 for 32-bit Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1809 for ARM64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 10 Version 1809 for x64-based Systems
Affected
Microsoft
Internet Explorer 11
Windows 7 for 32-bit Systems Service Pack 1
Affected
Microsoft
Internet Explorer 11
Windows 7 for x64-based Systems Service Pack 1
Affected
Microsoft
Internet Explorer 11
Windows 8.1 for 32-bit systems
Affected
Microsoft
Internet Explorer 11
Windows 8.1 for x64-based systems
Affected
Microsoft
Internet Explorer 11
Windows RT 8.1
Affected
Microsoft
Internet Explorer 11
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Affected
Microsoft
Internet Explorer 11
Windows Server 2012 R2
Affected
Microsoft
Internet Explorer 11
Windows Server 2016
Affected
- Published
- 20 Dec 2018
- Exploitation Reported
- 03 Nov 2021
- Attack vector
- Remote
- Complexity
- High
- Privileges
- None
- User interaction
- Required
Tags
microsoft
cisa
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2018-8653
- 106255 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/106255
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8653 portal.msrc.microsoft.com · CVE Record https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CV...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2021-11-03 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
7.5
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
24.3%
Weaknesses
All CVSS Scores
CVSS v3.1
7.5
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2.0
7.6
High
AV:N/AC:H/Au:N/C:C/I:C/A:C
Timeline
From disclosure to observed exploitation
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2018-8653
Free JSON includes basic KEV fields{
"cve_id": "CVE-2018-8653",
"confidence": "Confirmed",
"cvss_score": 7.5,
"cvss_estimated": false,
"epss_score": 0.24305,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.