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TI-2018-05957 Aliases CVE-2018-8238GHSA-v74r-x7x3-53vj

A security feature bypass vulnerability exists when Skype for Business or Lync do not…

Priority MEDIUM 43Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.05988 93rd 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

VendorProductAffected versionsFixed inStatusSource
MicrosoftSkypeBusiness 2016 (32-bit); Business 2016 (64-bit)—No fix listedCNA
MicrosoftMicrosoft Lync2013 Service Pack 1 (32-bit); 2013 Service Pack 1 (64-bit)—No fix listedCNA
  • Skype VendorMicrosoft Affected Business 2016 (32-bit); Business 2016 (64-bit) Fixed in — No fix listed CNA
  • Microsoft Lync VendorMicrosoft Affected 2013 Service Pack 1 (32-bit); 2013 Service Pack 1 (64-bit) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:lync:2013:sp1:*:*:*:*:*:*2013 sp1VulnerableMicrosoft
cpe:2.3:a:microsoft:skype_for_business:2016:*:*:*:*:*:*:*2016VulnerableMicrosoft
  • cpe:2.3:a:microsoft:lync:2013:sp1:*:*:*:*:*:* Versions 2013 sp1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:skype_for_business:2016:*:*:*:*:*:*:* Versions 2016 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-8238
  2. 2026-10-03 Alias added: GHSA-v74r-x7x3-53vj

References

Patch 1

  • TI-2015-01495 The Windows DirectWrite library, as used in Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1… KEVCVSS 3.1HIGH 7.8
  • TI-2013-03410 GDI+ in Microsoft Windows Vista SP2 and Server 2008 SP2; Office 2003 SP3, 2007 SP3, and… KEVCVSS 3.1HIGH 7.8
  • TI-2015-02157 Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows… CVSS 2.0HIGH 9.3
  • TI-2016-06177 The Graphics component in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2… CVSS 3.0CRITICAL 9.8
  • TI-2016-00122 The font library in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1… CVSS 3.0HIGH 8.8
  • TI-2015-02207 Buffer overflow in the Adobe Type Manager Library in Microsoft Windows Vista SP2, Windows… CVSS 2.0HIGH 9.3
See all 42 →

Sources

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