Denial of service in Microsoft Excel
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2022-33648 CVE-2022-33631 |
| CWE-ID | CWE-20 CWE-254 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Office Online Server Server applications / Other server solutions Microsoft Office LTSC 2021 Other software / Other software solutions Microsoft Office Client/Desktop applications / Office applications Microsoft Excel Client/Desktop applications / Office applications Microsoft 365 Apps for Enterprise Client/Desktop applications / Office applications |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Input validation error
EUVDB-ID: #VU66344
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-33648
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in the Microsoft Excel. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsOffice Online Server : All versions
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-33648
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) Security features bypass
EUVDB-ID: #VU66345
Risk: Medium
CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-33631
CWE-ID:
CWE-254 - Security Features
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to security feature bypass issue in Microsoft Excel. A remote user can trick a victim to open a specially crafted file and bypass the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft Office LTSC 2021: 32 bit editions - 64 bit editions
Microsoft Office: 2019
Microsoft Excel: 2013 RT Service Pack 1 - 2016
Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-33631
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
