Known exploited vulnerability
CVE-2021-42292
The short answer
CVE-2021-42292 affects Microsoft Microsoft 365 Apps for Enterprise and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-17: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
Microsoft Excel Security Feature Bypass Vulnerability
Severity
7.8 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 17, 2021
Federal due date Dec 1, 2021
EPSS, next 30 days
43%
Higher than 99% of scored CVEs
How it can be exploited
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Microsoft 365 Apps for Enterprise, Microsoft Excel 2013 Service Pack 1, Microsoft Excel 2016, Microsoft Office 2013 Service Pack 1, Microsoft Office 2016, Microsoft Office 2019, Microsoft Office 2019 for Mac, Microsoft Office LTSC 2021, Microsoft Office LTSC for Mac 2021. NVD's record lists the exact affected versions.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42292 PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42292 US Government Resource
Questions
Is CVE-2021-42292 being exploited?
Yes. CISA added CVE-2021-42292 to its Known Exploited Vulnerabilities catalog on 2021-11-17, with a federal remediation due date of 2021-12-01.
How do I fix CVE-2021-42292?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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