CVE-2021-34501
published 2021-07-14CVE-2021-34501: Microsoft Excel Remote Code Execution Vulnerability
PriorityP267high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
53.18%
98.9th percentile
Microsoft Excel Remote Code Execution Vulnerability
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | excel | — | — |
| microsoft | excel | — | — |
| microsoft | microsoft_365_apps_for_enterprise | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_excel_2013_service_pack_1 | >= 15.0.0.0 < 15.0.5363.1000 | 15.0.5363.1000 |
| microsoft | microsoft_excel_2016 | >= 16.0.0.0 < 16.0.5188.100 | 16.0.5188.100 |
| microsoft | microsoft_excel_2016 | >= 16.0.0.0 < 16.0.5188.1000 | 16.0.5188.1000 |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_2019_for_mac | >= 16.0.0 < 16.51.210711.01 | 16.51.210711.01 |
| microsoft | microsoft_office_online_server | >= 16.0.1 < 16.0.10376.20001 | 16.0.10376.20001 |
| microsoft | office | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_32-bit_systems | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_64-bit_systems | — | — |
| msrc | microsoft_excel_2013_rt_service_pack_1 | — | — |
| msrc | microsoft_excel_2013_service_pack_1 | — | — |
| msrc | microsoft_excel_2016 | — | — |
| msrc | microsoft_office_2019_for_32-bit_editions | — | — |
| msrc | microsoft_office_2019_for_64-bit_editions | — | — |
| msrc | microsoft_office_2019_for_mac | — | — |
| msrc | microsoft_office_online_server | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →Attack vector requires a user to open a specially crafted Excel file; monitor for unexpected Excel file opens originating from email attachments or web downloads ↗
- →Preview Pane is NOT an attack vector; exploitation requires full file open interaction — tune detections accordingly to focus on file-open events rather than preview events ↗
- ·Exploitation likelihood is rated 'Less Likely' for both latest and older software releases, and the vulnerability has not been publicly disclosed or exploited in the wild as of the advisory date ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
vendor_msrc7.8HIGH
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GHSA
GHSA-q4qr-976g-hx68: Microsoft Excel Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34518
ghsa_unreviewed·2022-05-24·CVSS 7.8
CVE-2021-34501 [HIGH] GHSA-q4qr-976g-hx68: Microsoft Excel Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34518
Microsoft Excel Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34518.
GHSA
GHSA-m57f-pffq-7g3c: Microsoft Excel Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34501
ghsa_unreviewed·2022-05-24·CVSS 7.8
CVE-2021-34518 [HIGH] GHSA-m57f-pffq-7g3c: Microsoft Excel Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34501
Microsoft Excel Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34501.
Microsoft
Microsoft Excel Remote Code Execution Vulnerability
vendor_msrc·2021-07-13·CVSS 7.8
CVE-2021-34501 [HIGH] Microsoft Excel Remote Code Execution Vulnerability
Microsoft Excel Remote Code Execution Vulnerability
FAQ: Is the Preview Pane an attack vector for this vulnerability?
No, the Preview Pane is not an attack vector.
FAQ: According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
Exploitation of the vulnerability requires that a user open a specially crafted file.
In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file.
In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) containing a specially crafted file designed to exploit the vulnerability.
An attacker would have no way to force users
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-07-14
Published