CVE-2026-97823: DNS Server out-of-bounds read information disclosure

CVE-2026-97823 · Severity: medium · CVSS 6.5 · Published 2026-10-13

A DNS server implementation contains an out-of-bounds read vulnerability that allows an authenticated attacker to read sensitive information from memory over the network. This could enable attackers with network access and valid credentials to extract configuration details, cached data, or other server information.

Technologies: Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows 11 26h2, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2025, DNS Server. Vendors: Microsoft.

Quick answers

Is CVE-2026-97823 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-97823 being exploited in the wild.
How severe is CVE-2026-97823?
Medium severity, with a CVSS score of 6.5, published 13 October 2026.
Which products and versions are affected?
DNS Server.
Is there a fix for CVE-2026-97823?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-97823 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-97823?
Check whether you run Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read flaw in the DNS server allows a network-based attacker with authentication credentials to access memory regions beyond allocated buffers. The vulnerability enables information disclosure but does not provide code execution or system compromise capabilities.

Affected products

  • DNS Server

Timeline

  • 2026-10-13: disclosed

References

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