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CVE-2017-8631

30
FAUCET Score

CVE-2017-8631 is a remote code execution vulnerability, dubbed "Microsoft Office Memory Corruption Vulnerability," affecting various Microsoft Excel and Office products, including Excel 2007-2016, Office Web Apps, and Office Online Server. This flaw stems from improper memory handling. With a CVSS score of 7.8 (High), exploitation requires user interaction (UI:R) and local access (AV:L), but can lead to high impact on confidentiality, integrity, and availability. While not listed in CISA's KEV catalog or having public exploit code like Metasploit, it garnered significant community discussion and media coverage at the time of its disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
2007CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2007:*:*:*:*:*:*:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2010:*:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:*:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
16.36%
Probability of exploitation in next 30 days
EPSS Percentile
96.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1636 is in the 96th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (22)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 9171-10120
View patch
microsoftpatch availablevia msrc
Product: 9171-10308
View patch
microsoftpatch availablevia msrc
Product: 9171-10307
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel Web App 2013 Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2016 (32-bit edition)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2016 (64-bit edition)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2007 Service Pack 3
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2010 Service Pack 2 (32-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2010 Service Pack 2 (64-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2013 RT Service Pack 1
microsoftpatch availablevia msrc
Product: Microsoft Excel 2013 Service Pack 1 (32-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2013 Service Pack 1 (64-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel for Mac 2011
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel 2016 for Mac
View patch
microsoftpatch availablevia msrc
Product: Microsoft Excel Viewer 2007 Service Pack 3
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office Compatibility Pack Service Pack 3
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office Web Apps 2013 Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Office Online Server
View patch
microsoftpatch availablevia msrc
Product: Excel Services on Microsoft SharePoint Server 2010 Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Excel Services on Microsoft SharePoint Server 2007 Service Pack 3 (32-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Excel Services on Microsoft SharePoint Server 2007 Service Pack 3 (64-bit editions)
View patch

Vendor Advisories (1)

microsoft2017-Sep/CVE-2017-8631Important

Microsoft Office Remote Code Execution Vulnerability

Sep 12, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-8631
PatchVendor Advisory
securityfocus.com / bid/100751
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039315
Third Party AdvisoryVDB Entry