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CVE-2017-8663

36
FAUCET Score

CVE-2017-8663 is a remote code execution vulnerability affecting Microsoft Outlook 2007 SP3, 2010 SP2, 2013 SP1, 2013 RT SP1, and 2016. It stems from how Outlook parses specially crafted email messages, potentially leading to memory corruption. This vulnerability has a CVSS v3 score of 7.8 (High), indicating a local attack vector with low complexity, requiring user interaction, and potentially leading to high impact on confidentiality, integrity, and availability. While no public exploit code (Metasploit, Nuclei, ExploitDB) is available, and it's not listed on CISA's KEV catalog, it has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2007CPE matchmatch criteria
cpe:2.3:a:microsoft:outlook:2007:sp3:*:*:*:*:*:*
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
20.08%
Probability of exploitation in next 30 days
EPSS Percentile
97.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2008 is in the 97th percentile among its peer group of 11,617 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 (15)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Office 2010 Click-to-Run (C2R) for 32-bit editions
microsoftpatch availablevia msrc
Product: Microsoft Office 2010 Click-to-Run (C2R) for 64-bit editions
microsoftpatch availablevia msrc
Product: Microsoft Office 2013 Click-to-Run (C2R) for 32-bit editions
microsoftpatch availablevia msrc
Product: Microsoft Office 2013 Click-to-Run (C2R) for 64-bit editions
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
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 2007 Service Pack 3
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

Vendor Advisories (1)

microsoft2017-Jul/CVE-2017-8663Important

Microsoft Office Remote Code Execution Vulnerability

Jul 11, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-8663
PatchVendor Advisory
securityfocus.com / bid/100004
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039011
Third Party AdvisoryVDB Entry