VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 3 November 2021Ransomware use: unknown
Microsoft Internet Explorer

CVE-2019-1429: Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, 722 days after the CVE record was published.

How likely is exploitation in the next 30 days?
77.3%

EPSS score, percentile 99.6 of all scored records

How severe?
7.5 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

Required action (CISA), due 3 May 2022: Apply updates per vendor instructions.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected: Windows Server 2008 for 32-bit Systems Service Pack 2; Windows Server 2008 for x64-based Systems Service Pack 2; 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 RT 8.1; 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; unspecified; unspecified; unspecified; unspecified; Windows Server 2012

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 3 May 2022.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Microsoft Internet Explorer 9
StatusVersions
AffectedWindows Server 2008 for 32-bit Systems Service Pack 2
AffectedWindows Server 2008 for x64-based Systems Service Pack 2
Microsoft Internet Explorer 11
StatusVersions
AffectedWindows 7 for 32-bit Systems Service Pack 1
AffectedWindows 7 for x64-based Systems Service Pack 1
AffectedWindows Server 2008 R2 for x64-based Systems Service Pack 1
AffectedWindows 8.1 for 32-bit systems
AffectedWindows 8.1 for x64-based systems
AffectedWindows Server 2012 R2
AffectedWindows RT 8.1
AffectedWindows 10 for 32-bit Systems
AffectedWindows 10 for x64-based Systems
AffectedWindows Server 2016
AffectedWindows 10 Version 1607 for 32-bit Systems
AffectedWindows 10 Version 1607 for x64-based Systems

And 10 more version entries in the CVE record.

Microsoft Internet Explorer 11 on Windows Server 2012
StatusVersions
Affectedunspecified
Microsoft Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems
StatusVersions
Affectedunspecified
Microsoft Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems
StatusVersions
Affectedunspecified
Microsoft Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems
StatusVersions
Affectedunspecified
Microsoft Internet Explorer 10
StatusVersions
AffectedWindows Server 2012

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Microsoft Internet Explorer contains a memory corruption vulnerability which can allow for remote code execution in the context of the current user.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2019-1429 to its Known Exploited Vulnerabilities (KEV) catalog on 3 Nov 2021.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 3 May 2022.
  • The CVE record was published on 12 Nov 2019, 722 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 7.5 (High), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 77.3% (percentile 99.6), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

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-2019-1426, CVE-2019-1427, CVE-2019-1428.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
12 Nov 2019CVE record published
3 Nov 2021Added to CISA KEV
3 May 2022CISA due date for the required action
12 Jan 2026CVE record last updated

References

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