CVE-2026-66308: CWE-125: Out-of-bounds Read in Microsoft Skype for Business Server 2015 CU13
Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-125) involves an out-of-bounds read in Microsoft Skype for Business Server 2015 CU13, specifically version 9319.0. An attacker with authorized access can exploit this flaw to cause a denial of service condition remotely. The CVSS v3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. Microsoft has published an official fix for this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to cause a denial of service (DoS) on the affected Skype for Business Server instance, potentially disrupting communications. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the provided patch to Skype for Business Server 2015 CU13 version 9319.0 as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66308 for detailed update instructions.
CVE-2026-66308: CWE-125: Out-of-bounds Read in Microsoft Skype for Business Server 2015 CU13
Description
Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-125) involves an out-of-bounds read in Microsoft Skype for Business Server 2015 CU13, specifically version 9319.0. An attacker with authorized access can exploit this flaw to cause a denial of service condition remotely. The CVSS v3.1 vector indicates network attack vector, low attack complexity, required privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability. Microsoft has published an official fix for this issue.
Potential Impact
An authorized attacker can exploit this vulnerability to cause a denial of service (DoS) on the affected Skype for Business Server instance, potentially disrupting communications. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Administrators should apply the provided patch to Skype for Business Server 2015 CU13 version 9319.0 as soon as possible to remediate this vulnerability. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66308 for detailed update instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-24T18:06:51.295Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66308","vendor":"Microsoft"}]
Threat ID: 6aa059e1acd9273b4913b804
Added to database: 09/08/2026, 18:54:25 UTC
Last enriched: 09/08/2026, 19:07:48 UTC
Last updated: 09/09/2026, 01:17:37 UTC
Views: 9
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