Multiple vulnerabilities in Microsoft Word
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-1715 CVE-2021-1716 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
Microsoft SharePoint Server Server applications / Application servers Microsoft Office Web Apps Server Server applications / Application servers Microsoft Office Client/Desktop applications / Office applications Microsoft Word Client/Desktop applications / Office applications Microsoft Office Web Apps Client/Desktop applications / Office applications Office Online Server Server applications / Other server solutions |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Input validation error
EUVDB-ID: #VU49430
Risk: High
CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2021-1715
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Word. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2010 - 2019
Microsoft Office: 2010 Service Pack 2 - 2019
Office Online Server: 2016
Microsoft Word: 2010 - 2016
Microsoft Office Web Apps: 2010 Service Pack 2
Microsoft Office Web Apps Server: 2013 Service Pack 1
CPE2.3- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2010:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2013:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2016:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office:2010 Service Pack 2:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office:*:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office_online_server:2016:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_word:*:*:*:*:*:microsoft_office:*:*
- cpe:2.3:a:microsoft:microsoft_word:2013 RT Service Pack 1:*:*:*:*:microsoft_office:*:*
- cpe:2.3:a:microsoft:microsoft_word:2013 Service Pack 1:*:*:*:*:microsoft_office:*:*
- cpe:2.3:a:microsoft:microsoft_office_web_apps:2010 Service Pack 2:*:*:*:*:microsoft_office:*:*
- cpe:2.3:a:microsoft:microsoft_office_web_apps_server:2013 Service Pack 1:*:*:*:*:*:*:*
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1715
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Input validation error
EUVDB-ID: #VU49431
Risk: High
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2021-1716
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the system.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Word. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Office Web Apps Server: 2013 Service Pack 1
Microsoft SharePoint Server: 2010 - 2019
Microsoft Office: 2010 Service Pack 2 - 2019
Office Online Server: 2016
Microsoft Word: 2010 - 2016
Microsoft Office Web Apps: 2010 Service Pack 2
CPE2.3- cpe:2.3:a:microsoft:microsoft_office_web_apps_server:2013 Service Pack 1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2010:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2013:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_sharepoint_server:2016:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office_online_server:2016:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:microsoft_office_web_apps:2010 Service Pack 2:*:*:*:*:microsoft_office:*:*
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1716
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
