CVE-2018-8558

Name: CVE-2018-8558
Creator: NVD / NIST
Published: 2018-11-14T01:29:01.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 5.58%

Last modified Jun 17, 2026

CVE-2018-8558 is a vulnerability of currently unknown severity. An information disclosure vulnerability exists when Microsoft Outlook fails to respect "Default link type" settings configured via the SharePoint Online Admin Center, aka "Microsoft Outlook Information Disclosure Vulnerability." This affects Office 365 ProPlus, Microsoft Office. This CVE ID is unique from CVE-2018-8579.. EPSS estimates a 5.58% chance of exploitation in the next 30 days.

Description

An information disclosure vulnerability exists when Microsoft Outlook fails to respect "Default link type" settings configured via the SharePoint Online Admin Center, aka "Microsoft Outlook Information Disclosure Vulnerability." This affects Office 365 ProPlus, Microsoft Office. This CVE ID is unique from CVE-2018-8579.

Metrics

EPSS Probability

5.58%

91.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Microsoft	Office	2019
Microsoft	Office 365 Proplus	All versions

References

http://www.securityfocus.com/bid/105826Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558Patch, Vendor Advisory
http://www.securityfocus.com/bid/105826Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558Patch, Vendor Advisory

Timeline

Published: Nov 14, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-8558?

How severe is CVE-2018-8558?

Severity scoring for CVE-2018-8558 is pending analysis. The EPSS model estimates a 5.58% probability of exploitation in the next 30 days.

How do I fix CVE-2018-8558?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-8558?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST