# CVE-2026-69999: Windows Update out-of-bounds read information disclosure

Source: https://junglewise.ai/threats/cve-2026-69999-out-of-bounds-read-in-windows-update-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-69999 · Severity: medium · CVSS 5.5 · Published 2026-10-13

Windows Update is a system component that downloads and installs security patches and updates for Windows. An authorized attacker with local access could exploit an out-of-bounds memory read to access sensitive information on the system. This vulnerability requires the attacker to already have authenticated access to the machine.

Technologies: [Microsoft Windows Update](https://junglewise.ai/threats/technologies/microsoft-windows-update), [Microsoft Windows 11 23h2](https://junglewise.ai/threats/technologies/windows-11-23h2), [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2), [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2), [Microsoft Windows 11 26h1](https://junglewise.ai/threats/technologies/windows-11-26h1), [Microsoft Windows 11 26h2](https://junglewise.ai/threats/technologies/windows-11-26h2), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69999 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69999 being exploited in the wild.

**How severe is CVE-2026-69999?** Medium severity, with a CVSS score of 5.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Update.

**Is there a fix for CVE-2026-69999?** 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-2026-69999 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-69999?** Check whether you run Microsoft Windows Update, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 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 exists in Windows Update that can be exploited by an authenticated local attacker to read memory beyond intended buffer boundaries. The vulnerability allows disclosure of sensitive information resident in memory adjacent to the vulnerable buffer. No evidence indicates active exploitation in the wild.

## Affected products

- Microsoft Windows Update

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69999](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69999)

## 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)