TI-2018-06216 Aliases CVE-2018-8558 GHSA-c7gg-mch8-hvm7

Information disclosure in Microsoft Office

LOW 37CWE-200Published 2018-11-14 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.

Summary

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.

Why it matters now

EPSS 0.05585 92nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	Microsoft Office	2019 for 32-bit editions; 2019 for 64-bit editions	—	No fix listed	CNA
Microsoft	Office	365 ProPlus for 32-bit Systems; 365 ProPlus for 64-bit Systems	—	No fix listed	CNA

Microsoft Office VendorMicrosoft Affected 2019 for 32-bit editions; 2019 for 64-bit editions Fixed in — No fix listed CNA
Office VendorMicrosoft Affected 365 ProPlus for 32-bit Systems; 365 ProPlus for 64-bit Systems Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:office:2019:::::::*	2019	Vulnerable	Microsoft
cpe:2.3:a:microsoft:office_365_proplus:-:::::::*	not specified by NVD	Vulnerable	Microsoft

cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:* Versions 2019 Vulnerable ·Microsoft
cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-8558
2026-10-03 Alias added: GHSA-c7gg-mch8-hvm7

References

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558

TI-2023-09240 Microsoft Outlook Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2019-01013 A remote code execution vulnerability exists in Microsoft Excel software when the… KEVCVSS 3.1HIGH 8.8
TI-2019-00335 Command injection in Microsoft Office KEVCVSS 3.1HIGH 8.8
TI-2018-00739 Out-of-bounds write in Microsoft Equation Editor KEVCVSS 3.1HIGH 8.8
TI-2015-02130 Microsoft PowerPoint 2007 SP3, Word 2007 SP3, PowerPoint 2010 SP2, Word 2010 SP2… KEVCVSS 3.1HIGH 8.8
TI-2015-01588 Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary… KEVCVSS 3.1HIGH 8.8

See all 1024 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences