Vulnerability Details : CVE-2021-40444
Microsoft MSHTML Remote Code Execution Vulnerability
Vulnerability category: Directory traversalExecute code
At least one public exploit which can be used to exploit this vulnerability exists!
CVE-2021-40444
is in the CISA Known Exploited Vulnerabilities Catalog
CISA vulnerability name:
Microsoft MSHTML Remote Code Execution Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Microsoft MSHTML contains a unspecified vulnerability which allows for remote code execution.
Added on
2021-11-03
Action due date
2021-11-17
Exploit prediction scoring system (EPSS) score for CVE-2021-40444
Probability of exploitation activity in the next 30 days: 97.12%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 100 % EPSS Score History EPSS FAQ
Metasploit modules for CVE-2021-40444
-
Microsoft Office Word Malicious MSHTML RCE
Disclosure Date : 2021-09-23exploit/windows/fileformat/word_mshtml_rceThis module creates a malicious docx file that when opened in Word on a vulnerable Windows system will lead to code execution. This vulnerability exists because an attacker can craft a malicious ActiveX control to be used by a Microsoft Office document that hosts the browser rendering engine.
CVSS scores for CVE-2021-40444
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
[email protected] |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
[email protected] |
CWE ids for CVE-2021-40444
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: [email protected] (Primary)
References for CVE-2021-40444
-
http://packetstormsecurity.com/files/167317/Microsoft-Office-MSDT-Follina-Proof-Of-Concept.html
Exploit;Third Party Advisory;VDB Entry
-
http://packetstormsecurity.com/files/165214/Microsoft-Office-Word-MSHTML-Remote-Code-Execution.html
Exploit;Third Party Advisory;VDB Entry
-
http://packetstormsecurity.com/files/164210/Microsoft-Windows-MSHTML-Overview.html
Exploit;Third Party Advisory;VDB Entry
-
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40444
Mitigation;Patch;Vendor Advisory
Products affected by CVE-2021-40444
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:-:*:-:*
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:-:*:-:*
- cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:*