CVE-2018-8378

Name: CVE-2018-8378
Creator: NVD / NIST
Published: 2018-08-15T17:29:07.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 6.85%

Last modified Jun 17, 2026

CVE-2018-8378 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 6.85% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

6.85%

93.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Excel Viewer	2007	Sp3
Microsoft	Office	2010	Sp2
Microsoft	Office	2013	Sp1
Microsoft	Office	2016	—
Microsoft	Office Compatibility Pack	All versions	Sp3
Microsoft	Office Web Apps	2010	Sp2
Microsoft	Office Web Apps	2013	Sp1
Microsoft	Office Word Viewer	All versions	—
Microsoft	Sharepoint Enterprise Server 2013	All versions	Sp1
Microsoft	Sharepoint Enterprise Server 2016	All versions	—
Microsoft	Sharepoint Server	2013	Sp1
Microsoft	Word Automation Services	All versions	—

References

http://www.securityfocus.com/bid/104996Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8378Patch, Vendor Advisory
http://www.securityfocus.com/bid/104996Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8378Patch, Vendor Advisory

Timeline

Published: Aug 15, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-8378?

How severe is CVE-2018-8378?

Severity scoring for CVE-2018-8378 is pending analysis. The EPSS model estimates a 6.85% probability of exploitation in the next 30 days.

How do I fix CVE-2018-8378?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-8378?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST