Vulnerability report

Trusted Third Party Report Confirmed Confidence In CISA KEV

CVE-2019-1367

Internet Explorer 9 Remote Code Execution

Microsoft / Internet Explorer 9 · Windows Server 2008 for 32-bit Systems Service Pack 2

Watch CVE-2019-1367 Browse KEV feed
Severity
CVSS 7.5 · High
Confidence
Confirmed
Exploit status
Trusted Third Party Report
EPSS
52.4%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2019-1367 is an unauthenticated vulnerability affecting Microsoft Internet Explorer 9 and 6 other products.

Have exploitation attempts been observed?

Yes. Exploitation attempts have been reported for this vulnerability. Previdian lists it as a known exploited vulnerability. Listed in CISA KEV. Confidence is confirmed.

Who is affected?

Affected products include Microsoft / Internet Explorer 9 and 6 other products, including Windows Server 2008 for 32-bit Systems Service Pack 2, Windows Server 2008 for x64-based Systems Service Pack 2, and Windows 7 for 32-bit Systems Service Pack 1.

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 CVE ID is unique from CVE-2019-1221.

Microsoft Affected
Internet Explorer 9
Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2
Microsoft Affected
Internet Explorer 11
Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows 8.1 for 32-bit systems Windows 8.1 for x64-based systems Windows Server 2012 R2 Windows 10 for 32-bit Systems Windows 10 for x64-based Systems Windows Server 2016 Windows 10 Version 1607 for 32-bit Systems Windows 10 Version 1607 for x64-based Systems Windows 10 Version 1703 for 32-bit Systems Windows 10 Version 1703 for x64-based Systems Windows 10 Version 1709 for 32-bit Systems Windows 10 Version 1709 for x64-based Systems Windows 10 Version 1803 for 32-bit Systems Windows 10 Version 1803 for x64-based Systems Windows 10 Version 1803 for ARM64-based Systems Windows 10 Version 1809 for 32-bit Systems Windows 10 Version 1809 for x64-based Systems Windows 10 Version 1809 for ARM64-based Systems Windows Server 2019 Windows 10 Version 1709 for ARM64-based Systems
Microsoft Affected
Internet Explorer 11 on Windows Server 2012
unspecified
Microsoft Affected
Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems
unspecified
Microsoft Affected
Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems
unspecified
Microsoft Affected
Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems
unspecified
Microsoft Affected
Internet Explorer 10
Windows Server 2012
Published
23 Sep 2019
Exploitation Attempts Reported
03 Nov 2021
Attack vector
Remote
Complexity
High
Privileges
None
User interaction
Required

Tags

ransomware microsoft windows cisa malware

CVE References

Exploitation evidence

Evidence of exploitation attempts

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploitation Attempts Observed in the Wild

CISA

Recorded 03 Nov 2021

A trusted third party reported exploitation attempts.

Targeted by Malware-Related Exploitation Attempts

CISA

Recorded 03 Nov 2021

Exploitation attempts against this vulnerability are associated with malware-related payloads.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian 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.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian 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

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

52.4%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Out-of-bounds Write CWE-787

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 attempts

  1. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. 00:00 UTC

    Targeted by malware-related exploitation attempts

    Malware-related exploitation attempts or payloads reported

  3. 19:14 UTC

    CVE published

    Vulnerability disclosed publicly

  4. 00:00 UTC

    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.

Start 14-day Pro trial Read API docs
  • 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-2019-1367

Sample API response 
{
  "cve_id": "CVE-2019-1367",
  "confidence": "Confirmed",
  "cvss_score": 7.5,
  "cvss_estimated": false,
  "epss_score": 0.52449,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}