# CVE-2026-88234: Microsoft Windows iSCSI use-after-free

Source: https://junglewise.ai/threats/cve-2026-88234-release-of-invalid-pointer-or-reference-in-windows-iscsi-allows  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-88234 · Severity: critical · CVSS 9.8 · Published 2026-11-10

Windows iSCSI is a storage networking component that allows systems to connect to remote storage over a network. A use-after-free vulnerability allows an attacker with network access to send a malicious iSCSI protocol message that causes arbitrary code execution, potentially compromising the entire system. No user interaction is required.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-88234 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-88234 being exploited in the wild.

**How severe is CVE-2026-88234?** Critical severity, with a CVSS score of 9.8, published 10 November 2026.

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

**Is there a fix for CVE-2026-88234?** 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-2026-88234 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-88234?** Check whether you run Microsoft Windows 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 (release of invalid pointer/reference) exists in the Windows iSCSI initiator implementation. The vulnerability is network-reachable and requires no authentication or user interaction, allowing a remote attacker to trigger the defect by crafting a malicious iSCSI protocol packet and gain code execution in the kernel context.

## Affected products

- Microsoft Windows <UNKNOWN>

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88234](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88234)

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