Attacker Value
Unknown
(2 users assessed)
Exploitability
Unknown
(2 users assessed)
User Interaction
Required
Privileges Required
None
Attack Vector
Network
5

CVE-2021-33742

Disclosure Date: June 08, 2021
Exploited in the Wild
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Windows MSHTML Platform Remote Code Execution Vulnerability

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3
Ratings
Technical Analysis

Windows MSHTML Platform (Microsoft proprietary browser engine) enables RCE and is being actively exploited in limited campaigns.
 Exploitation requires user interaction; thus, feasible threat scenarios include drive-by download, exploit kits, and phishing links.
 A commercial exploit company reportedly provided the exploit code to Eastern European and Middle Eastern state-sponsored actors

1
Technical Analysis

Based on comments at this thread: https://twitter.com/ShaneHuntley/status/1402320071276433408 we should expect to see a full writeup around July 9th or so from the Google threat assessment team. Seems they will be keeping things close to the vest until then to allow people to patch in the meantime.

CVSS V3 Severity and Metrics
Base Score:
7.5 High
Impact Score:
5.9
Exploitability Score:
1.6
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • microsoft

Products

  • windows 10 -,
  • windows 10 1607,
  • windows 10 1809,
  • windows 10 1909,
  • windows 10 2004,
  • windows 10 20h2,
  • windows 10 21h1,
  • windows 7 -,
  • windows 8.1 -,
  • windows rt 8.1 -,
  • windows server 2008 r2,
  • windows server 2008 sp2,
  • windows server 2012 -,
  • windows server 2012 r2,
  • windows server 2016 -,
  • windows server 2016 1909,
  • windows server 2016 2004,
  • windows server 2016 20h2,
  • windows server 2019 -

Exploited in the Wild

Reported by:

Additional Info

Technical Analysis