Use After Free in Microsoft 365 Apps
CVE-2020-1226
A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory, aka 'Microsoft Excel Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-1225.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.171 (97.0th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.171 · newest: 0.171 · change: 0.000
Affected products
- Microsoft 365 Apps
- Microsoft Excel — versions 2010, 2013, 2016
- Microsoft 365 Apps For Enterprise 32-Bit Systems — versions unspecified
- Microsoft 365 Apps For Enterprise 64-Bit Systems — versions unspecified
- Microsoft Excel — versions 2016 (32-bit edition), 2016 (64-bit edition), 2010 Service Pack 2 (32-bit editions)
- Microsoft Office — versions 2019 for 32-bit editions, 2019 for 64-bit editions, 2019 for Mac
- Microsoft Office — versions 2016, 2019
Weakness classification (CWE)
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1226 (Patch, Vendor Advisory)
- www.talosintelligence.com/vulnerability_reports/TALOS-2020-1027 (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-1226?
- CVE-2020-1226 is a high-severity vulnerability in Microsoft 365 Apps, classified under Use After Free. CVSS score: 8.8/10. Published 2020-06-09.
- How severe is CVE-2020-1226?
- High severity. CVSS v3 base score is 8.8 out of 10.