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CVE-2018-8522

33
FAUCET Score

CVE-2018-8522 is a remote code execution vulnerability in Microsoft Outlook, affecting Microsoft Office, Office 365 ProPlus, and Outlook RT, stemming from improper memory object handling. With a CVSS score of 7.8 (High), it requires user interaction (UI:R) but has low attack complexity (AC:L), potentially leading to high confidentiality, integrity, and availability impacts. While the FAUCET Risk Score is high at 91/100, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog. Community discussion and media coverage are minimal, suggesting limited public attention despite its severity.

Impacted Technologies

VendorProductVersion(s)CPE
2019CPE matchmatch criteria
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:outlook:2010:sp2:*:*:*:*:*:*
2013CPE matchmatch criteria
cpe:2.3:a:microsoft:outlook:2013:sp1:*:*:*:*:*:*
2016CPE matchmatch criteria
cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:*

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
19.06%
Probability of exploitation in next 30 days
EPSS Percentile
97.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1906 is in the 97th 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 (12)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2016 (32-bit edition)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2016 (64-bit edition)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2013 Service Pack 1 (32-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2013 Service Pack 1 (64-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2010 Service Pack 2 (32-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2010 Service Pack 2 (64-bit editions)
View patch
microsoftpatch availablevia msrc
Product: Microsoft Outlook 2013 RT Service Pack 1
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 64-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Microsoft Office 2019 for 32-bit editionsFixed in: https://aka.ms/OfficeSecurityReleases
microsoftpatch availablevia msrc
Product: Office 365 ProPlus for 64-bit Systems
microsoftpatch availablevia msrc
Product: Office 365 ProPlus for 32-bit Systems

Vendor Advisories (1)

microsoft2018-Nov/CVE-2018-8522Important

Microsoft Outlook Remote Code Execution Vulnerability

Nov 13, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8522
PatchVendor Advisory
securityfocus.com / bid/105820
Third Party AdvisoryVDB Entry
securitytracker.com / id/1042110
Third Party AdvisoryVDB Entry