CVE-2026-96976: Windows DNS out-of-bounds read information disclosure

CVE-2026-96976 · Severity: medium · CVSS 4.9 · Published 2026-11-10

Windows DNS resolver has an out-of-bounds read vulnerability that allows an authenticated attacker to extract sensitive information over the network. This could expose confidential data handled by the DNS service, potentially including cached queries or internal system information. The attacker must already have network access and valid credentials to exploit this flaw.

Technologies: Microsoft Windows DNS. Vendors: Microsoft.

Quick answers

Is CVE-2026-96976 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-96976 being exploited in the wild.
How severe is CVE-2026-96976?
Medium severity, with a CVSS score of 4.9, published 10 November 2026.
Which products and versions are affected?
Microsoft Windows DNS.
Is there a fix for CVE-2026-96976?
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-2026-96976 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-96976?
Check whether you run Microsoft Windows DNS. 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 in the Windows DNS service allows authenticated network attackers to trigger information disclosure by crafting malicious DNS requests. The vulnerability is triggered during DNS packet processing without requiring user interaction. A successful exploit results in memory disclosure from the DNS process.

Affected products

  • Microsoft Windows DNS

Timeline

  • 2026-11-10: disclosed

References

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