# CVE-2026-69881: Microsoft Windows IKE Extension null pointer dereference

Source: https://junglewise.ai/threats/cve-2026-69881-microsoft-windows-ike-extension-null-pointer-dereference  
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-2026-69881 · Severity: high · CVSS 7.5 · Published 2026-09-08

Windows IKE Extension is a network security component that handles encrypted connections over IP networks. A null pointer dereference vulnerability allows a remote attacker to crash the affected system and cause a denial of service, disrupting network communications and requiring manual intervention to restore service.

Technologies: [Microsoft Windows IKE Extension](https://junglewise.ai/threats/technologies/windows-ike-extension). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69881 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69881 being exploited in the wild.

**How severe is CVE-2026-69881?** High severity, with a CVSS score of 7.5, published 8 September 2026.

**Which products and versions are affected?** Microsoft Windows IKE Extension.

**Is there a fix for CVE-2026-69881?** 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-2026-69881 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-69881?** Check whether you run Microsoft Windows IKE Extension. 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 null pointer dereference vulnerability exists in Microsoft Windows IKE Extension that can be triggered by a network-based attacker without authentication. The vulnerability allows an attacker to send specially crafted network packets that cause the IKE extension to dereference a null pointer, resulting in a denial of service condition. The affected component is reachable over the network and does not require user interaction. An attacker can repeatedly trigger this crash to sustain a denial of service attack against the target system. Patches are expected from Microsoft as part of standard security updates.

## Affected products

- Microsoft Windows IKE Extension

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69881](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69881)

## Related threats

- [Microsoft Windows IKE Extension access control bypass allows spoofing](https://junglewise.ai/threats/cve-2026-122169-insufficient-granularity-of-access-control-in-windows-ike)
- [Microsoft Windows IKE Extension out-of-bounds read](https://junglewise.ai/threats/cve-2026-83521-out-of-bounds-read-in-windows-ike-extension-allows-an-authorized)
- [Microsoft Windows IKE Extension null pointer dereference](https://junglewise.ai/threats/cve-2026-69587-microsoft-windows-ike-extension-null-pointer-dereference)
- [Microsoft Windows IKE Extension heap buffer overflow](https://junglewise.ai/threats/cve-2026-69429-microsoft-windows-ike-extension-heap-buffer-overflow)