What is the CVSS score of CVE-2020-0674?

CVE-2020-0674 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 93.6%.

Which versions of Internet Explorer are affected by CVE-2020-0674?

CVE-2020-0674 presents notable security risk, a use-after-free vulnerability rated CVSS 7.5. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2020-0674?

Yes, a public proof-of-concept exploit is available for CVE-2020-0674. Prioritise patching immediately. EPSS: 93.6%.

How to fix or mitigate CVE-2020-0674?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Internet Explorer CVE-2020-0674

HIGH

Use After Free (CWE-416)

2020-02-11 secure@microsoft.com

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 26, 2026 - 11:19 vuln.today

Added to CISA KEV

Oct 29, 2025 - 14:27 cisa

CISA KEV

PoC Detected

Oct 29, 2025 - 14:27 vuln.today

Public exploit code

Patch released

Oct 29, 2025 - 14:27 nvd

Patch available

CVE Published

Feb 11, 2020 - 22:15 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

Internet Explorer scripting engine contains a use-after-free vulnerability allowing remote code execution through crafted web pages, exploited as a zero-day in January 2020 in targeted campaigns attributed to DarkHotel APT.

Technical ContextAI

The CWE-416 use-after-free in jscript.dll occurs during garbage collection of JavaScript objects. A crafted sequence of operations triggers freeing of an object while still referenced, allowing heap manipulation for arbitrary code execution.