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Fencer Vulns
high 7.5

CVE-2020-0674 kev in the critical feed json

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scri…

published 2020-02-11 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2167

cvss
7.5
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03
epss
86.9%
EPSS 86.9% chance of exploitation in 30 days, percentile 99.7%
public exploits
2
Exploit-DB

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

Timeline

  1. 0-day patched (Project Zero)
  2. Published
  3. First public exploit (EDB-49062)
  4. Added to CISA KEV
  5. CISA patch deadline
  6. CISA SSVC: exploitation active

Known exploited

Added
5 y ago
Patch by
2022-05-03 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Microsoft, Internet Explorer
CISA name
Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched
2020-02-11
Details
project zero root cause analysis

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

86.86% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-49863 Microsoft Internet Explorer 11 and WPAD service 'Jscript.dll' - Use-After-Free local, 2021-05-13
  • EDB-49062 Microsoft Internet Explorer 11 - Use-After-Free local, 2020-11-17
  • github.com https://github.com/maxpl0it/CVE-2020-0674-Exploit referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/159137/Microsoft-Internet-Explorer-11-Use-After-Free.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/161309/Microsoft-Internet-Explorer-11-Use-After-Free.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/162565/Microsoft-Internet-Explorer-8-11-Use-After-Free.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 7.6 AV:N/AC:H/Au:N/C:C/I:C/A:C

Affected products

  • Microsoft Internet Explorer 10
  • Microsoft Internet Explorer 11
  • Microsoft Internet Explorer 11 on Windows 10 Version 1909 for 32-bit Systems
  • Microsoft Internet Explorer 11 on Windows 10 Version 1909 for x64-based Systems
  • Microsoft Internet Explorer 11 on Windows 10 Version 1909 for ARM64-based Systems
  • Microsoft Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems
  • Microsoft Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems
  • Microsoft Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems
  • Microsoft Internet Explorer 11 on Windows Server 2012
  • Microsoft Internet Explorer 9

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.