CVE-2026-88129: CWE-125: Out-of-bounds Read in Microsoft Windows Server 2012
Description
CVE-2026-88129 is an out-of-bounds read vulnerability in the DNS Server component of Microsoft Windows Server 2012 and related versions. This flaw allows an authorized attacker to cause a denial of service (DoS) over a network. The vulnerability has a medium severity rating with a CVSS score of 6.5. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 6.5medium
Affected software
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-88129) involves an out-of-bounds read in the DNS Server of Microsoft Windows Server 2012 and other specified versions. An authorized attacker can exploit this flaw to cause a denial of service condition over the network. The CVSS 3.1 base score is 6.5, indicating medium severity, with attack vector network, low attack complexity, and requiring privileges. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability results in denial of service (DoS) on affected systems by causing an out-of-bounds read in the DNS Server. There is no impact on confidentiality or integrity, only availability is affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88129 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.397Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88129","vendor":"Microsoft"}]
Threat ID: 6ace855d2cdf04f6569ff519
Added to database: 10/13/2026, 19:24:13 UTC
Last enriched: 10/14/2026, 01:48:58 UTC
Last updated: 10/14/2026, 01:48:58 UTC
Views: 4
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