What is CVE-2018-8558?

CVE-2018-8558 is a medium-severity vulnerability in Microsoft Office, classified under Information Disclosure. CVSS score: 6.5/10. Published 2018-11-14.

How severe is CVE-2018-8558?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in Microsoft Office

CVE-2018-8558

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.

Vulnerability class: Information Disclosure

EPSS: 0.056 (92.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Microsoft Office — versions 2019 for 32-bit editions, 2019 for 64-bit editions
Microsoft Office — versions 365 ProPlus for 32-bit Systems, 365 ProPlus for 64-bit Systems, 2019
Microsoft Office_365_proplus

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

secure@microsoft.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
secure@microsoft.com (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-8558?: CVE-2018-8558 is a medium-severity vulnerability in Microsoft Office, classified under Information Disclosure. CVSS score: 6.5/10. Published 2018-11-14.
How severe is CVE-2018-8558?: Medium severity. CVSS v3 base score is 6.5 out of 10.