# CVE-2026-88130: Microsoft DNS Server out-of-bounds read denial of service

Source: https://junglewise.ai/threats/cve-2026-88130-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-88130 · Severity: medium · CVSS 6.5 · Published 2026-10-13

Microsoft DNS Server contains an out-of-bounds read vulnerability that allows an authenticated attacker to crash the DNS service, causing service disruption for DNS queries across an organization's network. An attacker with network access and valid credentials can trigger this condition to deny legitimate DNS resolution requests.

Technologies: [Microsoft DNS Server](https://junglewise.ai/threats/technologies/microsoft-dns-server), [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012), [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016), [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019), [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-88130 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-88130 being exploited in the wild.

**How severe is CVE-2026-88130?** Medium severity, with a CVSS score of 6.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft DNS Server.

**Is there a fix for CVE-2026-88130?** 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-2026-88130 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-88130?** Check whether you run Microsoft DNS Server, Microsoft Windows Server 2012, Microsoft Windows Server 2016 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 vulnerability in Microsoft DNS Server allows an authorized attacker to craft a malicious DNS query that reads memory beyond allocated buffer boundaries, causing the DNS service to crash. This requires network access and valid authentication credentials. The resulting denial of service prevents DNS resolution until the service is restarted.

## Affected products

- Microsoft DNS Server

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88130](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88130)

## Related threats

- [Windows DNS Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-97844-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97843-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97842-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-97841-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97840-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)