Microsoft Windows DNS Server: Information disclosure via out-of-bounds read
Summary
Microsoft Windows DNS Server contains an out-of-bounds read (CWE-125) that can disclose information from memory. According to the CVSS vector, an attacker needs local access and low privileges, and the impact is limited to confidentiality. The CVSS vector rates the vulnerability as not remotely exploitable.
Affected
- Windows Server 2016 (incl. Server Core) before 10.0.14393.9688
- Windows Server 2019 (incl. Server Core) before 10.0.17763.9487
- Windows Server 2022 before 10.0.20348.5870
- Windows Server 2025 (incl. Server Core) before 10.0.26100.33822
Fixed in
- November 2026 security update for each affected Windows Server build. The exact KB number per product: Unknown. Check the MSRC advisory.
Workaround
Unknown. No workaround or mitigation was found in the sources. Check the MSRC advisory.
Exploitation
- Rapid7 rates exploitation as less likely and not publicly disclosed.
- CISA SSVC: exploitation none, not automatable.
- No public proof of concept found; no known exploitation in the wild found.
Our recommendation
- Install the November 2026 security update on all Windows DNS servers, prioritising domain controllers and servers with the DNS role.
- Confirm the fixed build against the MSRC advisory.
- Restrict local logon to DNS servers to administrators and monitor for unusual local activity.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Information disclosure – Role: DNS Server
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131090, KB5131080, KB5131077
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- MSRC Security Update Guide: CVE-2026-96112 msrc.microsoft.com
- CVE Record CVE-2026-96112 www.cve.org
- Rapid7: Patch Tuesday November 2026 www.rapid7.com
- Strix CVE summary CVE-2026-96112 (third-party) www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 16:27.
Original description (NVD)
Out-of-bounds read in DNS Server allows an authorized attacker to disclose information locally.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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