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CVE-2026-97841 Microsoft CVE debrief

The CVE-2026-97841 vulnerability is an out-of-bounds read issue in the DNS Server that allows an authorized attacker to disclose information over a network. This vulnerability has a CVSS score of 6.5 and is classified as MEDIUM severity. Multiple Windows versions and server editions are affected, including Windows 10, Windows 11, and Windows Server versions from 2012 to 2025.

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-14
Advisory published
2026-10-13
Advisory updated
2026-10-14

Who should care

Defenders responsible for Windows Server and DNS infrastructure should assess exposure and prioritize patching. System administrators and security teams managing Windows deployments need to verify affected versions and apply updates.

Why it matters

CVE-2026-97841 is a MEDIUM-severity vulnerability in DNS Server that allows authorized attackers to disclose information. Defenders should prioritize patching affected Windows versions and servers to prevent potential information disclosure.

  • Potential information disclosure over the network
  • Requires verification of affected versions and exposure
  • Patching priority for internet-exposed systems
  • Inventory and update management for Windows deployments

Technical summary

An out-of-bounds read vulnerability in the DNS Server allows an authorized attacker to disclose information over a network. Affected products include Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows 11 Version 26H2, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, and Windows Server 2025.

Defensive priority

Defenders should prioritize patching affected systems, especially those exposed to the internet or untrusted networks, to prevent potential information disclosure.

Recommended defensive actions

  • Patch affected Windows 10, Windows 11, and Windows Server versions
  • Verify and apply updates from Microsoft
  • Review and update inventory of affected systems

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. Microsoft's advisory is available but not directly referenced in the generated text.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-97841 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-97841

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-97841 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-97841

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Role: DNS Server Information Disclosure Vulnerability

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/97xxx/CVE-2026-97841.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97841

    Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.