# CVE-2026-69757: Microsoft Windows TCP/IP use-after-free privilege escalation

Source: https://junglewise.ai/threats/cve-2026-69757-microsoft-windows-tcp-ip-use-after-free-privilege-escalation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-69757 · Severity: high · CVSS 7.1 · Published 2026-09-08

Windows TCP/IP, a core networking component used to enable all network communication on Windows systems, contains a memory safety vulnerability that can allow an authorized attacker to gain elevated privileges over the network. This could lead to unauthorized system-level access and complete compromise of an affected computer.

Technologies: [Microsoft Windows TCP/IP](https://junglewise.ai/threats/technologies/windows-tcp-ip). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69757 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69757 being exploited in the wild.

**How severe is CVE-2026-69757?** High severity, with a CVSS score of 7.1, published 8 September 2026.

**Which products and versions are affected?** Microsoft Windows TCP/IP <UNKNOWN>.

**Is there a fix for CVE-2026-69757?** 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-2026-69757 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-69757?** Check whether you run Microsoft Windows TCP/IP at an affected version. 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

A use-after-free vulnerability exists in the Windows TCP/IP stack that can be exploited by an authorized attacker to achieve privilege escalation. The vulnerability requires network access and an authenticated user context to exploit. An attacker who successfully exploits this vulnerability can execute code with elevated privileges (SYSTEM level), leading to complete system compromise. A patch is available from Microsoft.

## Affected products

- Microsoft Windows TCP/IP <UNKNOWN>

## Timeline

- 2026-09-08: disclosed
- other: Not reported exploited in wild as of disclosure date

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69757](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69757)

## Related threats

- [Windows TCP/IP use-after-free privilege elevation](https://junglewise.ai/threats/cve-2026-96852-use-after-free-in-windows-tcp-ip-allows-an-authorized-attacker-to)
- [Microsoft Windows TCP/IP security feature bypass](https://junglewise.ai/threats/cve-2026-69793-microsoft-windows-tcp-ip-security-feature-bypass)