Out-of-bounds Read in Microsoft Excel Viewer
CVE-2018-8378
An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory, aka "Microsoft Office Information Disclosure Vulnerability." This affects Word, Microsoft SharePoint Server, Microsoft Office Word Viewer, Microsoft Excel Viewer, Microsoft SharePoint, Microsoft Office.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.068 (94.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.082 · newest: 0.068 · change: -0.014
Affected products
- Microsoft Excel Viewer — versions 2007
- Microsoft Excel Viewer — versions 2007 Service Pack 3
- Microsoft Office — versions 2010 Service Pack 2 (32-bit editions), 2010 Service Pack 2 (64-bit editions), 2013 RT Service Pack 1
- Microsoft Office Word Viewer — versions Microsoft Office Word Viewer
- Microsoft Sharepoint — versions Enterprise Server 2013 Service Pack 1, Enterprise Server 2016
- Microsoft Sharepoint Server — versions 2013 Service Pack 1
- Microsoft Office — versions 2010, 2013, 2016
- Microsoft Office Compatibility Pack
- Microsoft Office Web Apps — versions 2010, 2013
- Microsoft Office Word Viewer
Weakness classification (CWE)
References
- www.securityfocus.com/bid/104996 (VDB Entry, Third Party Advisory, vdb-entry)
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8378 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-8378?
- CVE-2018-8378 is a medium-severity vulnerability in Microsoft Excel Viewer, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2018-08-15.
- How severe is CVE-2018-8378?
- Medium severity. CVSS v3 base score is 5.5 out of 10.