CVE-2026-66302: CWE-73: External Control of File Name or Path in Microsoft Skype for Business Server 2015 CU13
CVE-2026-66302 is a critical vulnerability in Microsoft Skype for Business Server 2015 CU13 (version 9319.0) that allows an unauthorized attacker to execute code remotely by externally controlling file names or paths. This vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability. An official fix is available from Microsoft to remediate this issue.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-73 (External Control of File Name or Path), affects Microsoft Skype for Business Server 2015 CU13 version 9319.0. It allows an attacker to remotely execute code by manipulating file names or paths over the network without requiring privileges or user interaction. The CVSS 3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation enables remote code execution by an attacker without authentication or user interaction, potentially leading to full system compromise including data confidentiality, integrity, and availability loss.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302 to remediate this vulnerability.
CVE-2026-66302: CWE-73: External Control of File Name or Path in Microsoft Skype for Business Server 2015 CU13
Description
CVE-2026-66302 is a critical vulnerability in Microsoft Skype for Business Server 2015 CU13 (version 9319.0) that allows an unauthorized attacker to execute code remotely by externally controlling file names or paths. This vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability. An official fix is available from Microsoft to remediate this issue.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-73 (External Control of File Name or Path), affects Microsoft Skype for Business Server 2015 CU13 version 9319.0. It allows an attacker to remotely execute code by manipulating file names or paths over the network without requiring privileges or user interaction. The CVSS 3.1 base score is 9.8, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation enables remote code execution by an attacker without authentication or user interaction, potentially leading to full system compromise including data confidentiality, integrity, and availability loss.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-24T18:06:51.294Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302","vendor":"Microsoft"}]
Threat ID: 6aa059e1acd9273b4913b7fc
Added to database: 09/08/2026, 18:54:25 UTC
Last enriched: 09/08/2026, 19:07:17 UTC
Last updated: 09/08/2026, 20:21:18 UTC
Views: 5
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