CVE-2026-66306: CWE-209: Generation of Error Message Containing Sensitive Information in Microsoft Skype for Business Server 2015 CU13
Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.
AI Analysis
Technical Summary
This vulnerability involves the generation of error messages in Microsoft Skype for Business Server 2015 CU13 that contain sensitive information, which can be disclosed to unauthorized attackers over the network. The vulnerability is classified under CWE-209 (Generation of Error Message Containing Sensitive Information). It has a CVSS 3.1 base score of 6.5, indicating medium severity, with network attack vector, low attack complexity, no privileges required, user interaction required, and high confidentiality impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can obtain sensitive information from error messages generated by the vulnerable Skype for Business Server 2015 CU13, potentially aiding further attacks or reconnaissance. The vulnerability does not impact integrity or availability, but confidentiality is rated high.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided by Microsoft for Skype for Business Server 2015 CU13 version 9319.0 as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66306.
CVE-2026-66306: CWE-209: Generation of Error Message Containing Sensitive Information in Microsoft Skype for Business Server 2015 CU13
Description
Generation of error message containing sensitive information in Skype for Business allows an unauthorized attacker to disclose information over a network.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves the generation of error messages in Microsoft Skype for Business Server 2015 CU13 that contain sensitive information, which can be disclosed to unauthorized attackers over the network. The vulnerability is classified under CWE-209 (Generation of Error Message Containing Sensitive Information). It has a CVSS 3.1 base score of 6.5, indicating medium severity, with network attack vector, low attack complexity, no privileges required, user interaction required, and high confidentiality impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can obtain sensitive information from error messages generated by the vulnerable Skype for Business Server 2015 CU13, potentially aiding further attacks or reconnaissance. The vulnerability does not impact integrity or availability, but confidentiality is rated high.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided by Microsoft for Skype for Business Server 2015 CU13 version 9319.0 as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66306.
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-2026-66306","vendor":"Microsoft"}]
Threat ID: 6aa059e1acd9273b4913b802
Added to database: 09/08/2026, 18:54:25 UTC
Last enriched: 09/08/2026, 19:07:52 UTC
Last updated: 09/09/2026, 01:17:35 UTC
Views: 8
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