VulnerabilityAnalyzed
CVE-2021-42292
Microsoft Excel Security Feature Bypass
KEVHIGH 7.8EPSS 43.0%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 1 December 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Microsoft Excel Security Feature Bypass Vulnerability
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 43.00% probability · 99th percentile
- CISA KEV
- Listed 17 November 2021 · due 1 December 2021
- Affected
- microsoft/365 apps · microsoft/excel · microsoft/office · microsoft/office 2016 · microsoft/office 2019 · microsoft/office 2021
- Source
- secure@microsoft.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-42292
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42292Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42292US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.