# CVE-2026-105518: Microsoft Windows iSCSI use-after-free remote code execution

Source: https://junglewise.ai/threats/cve-2026-105518-use-after-free-in-windows-iscsi-allows-an-unauthorized-attacker  
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-2026-105518 · Severity: high · CVSS 8.8 · Published 2026-11-10

Windows iSCSI is a network storage protocol that allows systems to connect to remote storage devices over IP networks. A use-after-free vulnerability in this component allows an attacker to execute arbitrary code on affected systems remotely without authentication, potentially leading to full system compromise.

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

## Quick answers

**Is CVE-2026-105518 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105518 being exploited in the wild.

**How severe is CVE-2026-105518?** High severity, with a CVSS score of 8.8, published 10 November 2026.

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

**Is there a fix for CVE-2026-105518?** 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-2026-105518 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-105518?** Check whether you run Microsoft Windows iSCSI. 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 flaw exists in the Windows iSCSI initiator that can be triggered over the network without prior authentication. An attacker can exploit this memory safety issue to achieve arbitrary code execution with the privileges of the iSCSI service. The vulnerability is exploitable remotely and has not been observed in active exploitation.

## Affected products

- Microsoft Windows iSCSI

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105518](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105518)

## Related threats

- [Microsoft Windows iSCSI heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-70095-heap-based-buffer-overflow-in-windows-iscsi-allows-an)
- [Microsoft Windows iSCSI use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-70038-use-after-free-in-windows-iscsi-allows-an-unauthorized-attacker)
- [Microsoft Windows iSCSI out-of-bounds write](https://junglewise.ai/threats/cve-2026-69705-out-of-bounds-write-in-windows-iscsi-allows-an-unauthorized)
- [Microsoft Windows iSCSI information disclosure](https://junglewise.ai/threats/cve-2026-69644-exposure-of-sensitive-system-information-to-an-unauthorized)
- [Microsoft Windows iSCSI buffer overflow](https://junglewise.ai/threats/cve-2026-69598-microsoft-windows-iscsi-buffer-overflow)