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CVE-2018-8331

34
FAUCET Score

CVE-2018-8331 is a remote code execution vulnerability in Microsoft Excel and Microsoft Office, stemming from improper handling of objects in memory. With a CVSS score of 7.8 (High), it requires user interaction (UI:R) and local access (AV:L) but can lead to high confidentiality, integrity, and availability impacts (C:H/I:H/A:H). While not currently listed on the KEV catalog and lacking public exploit code in Metasploit, Nuclei, or ExploitDB, it has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:excel:-:*:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2016:*:*:*:*:mac:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
19.55%
Probability of exploitation in next 30 days
EPSS Percentile
97.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1955 is in the 97th percentile among its peer group of 11,615 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 (4)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 for Mac
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 Click-to-Run (C2R) for 32-bit editions
microsoftpatch availablevia msrc
Product: Microsoft Office 2016 Click-to-Run (C2R) for 64-bit editions

Vendor Advisories (1)

microsoft2018-Sep/CVE-2018-8331Important

Microsoft Excel Remote Code Execution Vulnerability

Sep 11, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8331
PatchVendor Advisory
securityfocus.com / bid/105206
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041630
Third Party AdvisoryVDB Entry