High severity · published Jul 14, 2021
CVE-2021-34501
Microsoft Excel Remote Code Execution Vulnerability
7.8
CVSS
51.7%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)51.7% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OF
Office · Microsoft
2019; 2019 · source: NVD
EX
Excel · Microsoft
2013; 2013; 2016 · source: NVD
OO
Office Online Server · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34501
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34501
msrc.microsoft.com
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34501
Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34501
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-969/
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