CVE-2020-0674: 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, 631 days after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 86.9%
EPSS score, percentile 99.7 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 2012; 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 32-bit Systems; Windows 10 Version 1709 for x64-based Systems; Windows 10 Version 1709 for ARM64-based Systems; Windows 10 for 32-bit Systems; Windows 10 for x64-based Systems; unspecified; unspecified; unspecified; unspecified; unspecified; unspecified; unspecified; Windows Server 2008 for x64-based Systems Service Pack 2; Windows Server 2008 for 32-bit Systems Service Pack 2
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.
| Status | Versions |
|---|---|
| Affected | Windows Server 2012 |
| Status | Versions |
|---|---|
| Affected | Windows 10 Version 1803 for 32-bit Systems |
| Affected | Windows 10 Version 1803 for x64-based Systems |
| Affected | Windows 10 Version 1803 for ARM64-based Systems |
| Affected | Windows 10 Version 1809 for 32-bit Systems |
| Affected | Windows 10 Version 1809 for x64-based Systems |
| Affected | Windows 10 Version 1809 for ARM64-based Systems |
| Affected | Windows Server 2019 |
| Affected | Windows 10 Version 1709 for 32-bit Systems |
| Affected | Windows 10 Version 1709 for x64-based Systems |
| Affected | Windows 10 Version 1709 for ARM64-based Systems |
| Affected | Windows 10 for 32-bit Systems |
| Affected | Windows 10 for x64-based Systems |
And 10 more version entries in the CVE record.
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | unspecified |
| Status | Versions |
|---|---|
| Affected | Windows Server 2008 for x64-based Systems Service Pack 2 |
| Affected | Windows Server 2008 for 32-bit Systems Service Pack 2 |
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 due to the way the Scripting Engine handles objects in memory. Successful exploitation could allow remote code execution in the context of the current user.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2020-0674 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 11 Feb 2020, 631 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 86.9% (percentile 99.7), 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-2020-0673, CVE-2020-0710, CVE-2020-0711, CVE-2020-0712, CVE-2020-0713, CVE-2020-0767.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-416: Use After Free
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 11 Feb 2020 | CVE record published |
| 3 Nov 2021 | Added to CISA KEV |
| 3 May 2022 | CISA due date for the required action |
| 21 Oct 2025 | CVE record last updated |
References
- portal.msrc.microsoft.com
- github.com
- packetstormsecurity.com
- packetstormsecurity.com
- packetstormsecurity.com
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