# CVE-2026-70095: Microsoft Windows iSCSI heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-70095-heap-based-buffer-overflow-in-windows-iscsi-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-70095 · Severity: high · CVSS 7.5 · Published 2026-10-13

Windows iSCSI is a protocol used to connect storage devices over networks. A heap-based buffer overflow vulnerability allows an attacker on the network to send malicious packets that execute arbitrary code on the affected system, potentially compromising sensitive data or taking control of the machine.

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

## Quick answers

**Is CVE-2026-70095 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70095 being exploited in the wild.

**How severe is CVE-2026-70095?** High severity, with a CVSS score of 7.5, published 13 October 2026.

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

**Is there a fix for CVE-2026-70095?** 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-2026-70095 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-70095?** 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 heap-based buffer overflow exists in Windows iSCSI that can be triggered by a malicious network packet without authentication. The vulnerability allows remote code execution when the overflow is exploited by an attacker on the network, providing complete system compromise capabilities.

## Affected products

- Microsoft Windows iSCSI

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70095](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70095)

## Related threats

- [Microsoft Windows iSCSI use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-105518-use-after-free-in-windows-iscsi-allows-an-unauthorized-attacker)
- [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)