What’s Vulnerable › Vulnerabilities

CVE-2018-8238

• Severity: high (CVSS 7.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-07-11 · updated 2026-06-17

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.

Affected products

• Microsoft Lync Server: 2013-sp1
• Microsoft Skype for Business Server 2019 CU2: 2016
• Microsoft Lync Server: 2013 Service Pack 1 (32-bit), 2013 Service Pack 1 (64-bit)
• Microsoft Skype: Business 2016 (32-bit), Business 2016 (64-bit)

References

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

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