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CVE-2018-8598

20
FAUCET Score

CVE-2018-8598 is an information disclosure vulnerability in Microsoft Excel, affecting Office 365 ProPlus, Microsoft Office, and Microsoft Excel. This medium-severity flaw (CVSS 4.7) allows an attacker to improperly disclose memory contents, requiring user interaction and high attack complexity. Although it was patched in December 2018 and mentioned in a BleepingComputer article, there is no known public exploit code (Metasploit, Nuclei, ExploitDB) and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2010:sp2:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.7MEDIUM

CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.0
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.22%
Probability of exploitation in next 30 days
EPSS Percentile
92.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0622 is in the 99th percentile among its peer group of 167 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 32-bit editions
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 64-bit editions
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 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: Office 365 ProPlus for 32-bit Systems
microsoftpatch availablevia msrc
Product: Office 365 ProPlus for 64-bit Systems

Vendor Advisories (1)

microsoft2018-Dec/CVE-2018-8598Important

Microsoft Excel Information Disclosure Vulnerability

Dec 11, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8598
PatchVendor Advisory
securityfocus.com / bid/106102
Third Party AdvisoryVDB Entry