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
Microsoft
Skype for Business Server 2015 CU13
Microsoft
Skype for Business Server 2019 CU8
Microsoft
Skype for Business Server Subscription Edition CU1
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in Microsoft Skype for Business Server 2015 CU13. An authorized attacker can exploit this flaw to cause a denial of service (DoS) condition over the network. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and impact limited to availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Exploitation of this vulnerability can result in denial of service, disrupting the availability of Skype for Business Server 2015 CU13. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the provided patch as detailed in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66308 to remediate this vulnerability.
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: 10/14/2026, 21:29:45 UTC
Last updated: 10/23/2026, 01:15:25 UTC
Views: 73
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