Actively exploited · Published Nov 10, 2021 · Assigned by microsoft
CVE-2021-42292Microsoft Excel Security Feature Bypass Vulnerability
High 7.8 Exploited
In plain English
A high-severity security flaw in Microsoft 365 Apps for Enterprise from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on November 17, 2021). The chance it is exploited in the next 30 days is estimated at 43.0% (higher than 99% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)43.0%top 1.3% of all CVEs
Exploited in the wildYesCISA KEV since Nov 17, 2021
Attack tooling1Public PoC
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Dec 1, 2021.
Official description
Microsoft Excel Security Feature Bypass Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 – before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Excel 2013 Service Pack 1 | 15.0.0.0 – before 15.0.5397.1001 |
| Microsoft | Microsoft Excel 2016 | 16.0.0.0 – before 16.0.5239.1001 |
| Microsoft | Microsoft Office 2013 Service Pack 1 | 15.0.0 – before 15.0.5397.1001 |
| Microsoft | Microsoft Office 2016 | 16.0.0 – before 16.0.5239.1001 |
| Microsoft | Microsoft Office 2019 | 19.0.0 – before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office 2019 for Mac | 16.0.0 – before 16.55.21111400 |
| Microsoft | Microsoft Office LTSC 2021 | 16.0.1 – before https://aka.ms/OfficeSecurityReleases |
| Microsoft | Microsoft Office LTSC for Mac 2021 | 16.0.1 – before 16.55.21111400 |
References
- Microsoft Excel Security Feature Bypass Vulnerability vendor-advisory, patch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292 x_refsource_MISC, x_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42292 government-resource