# CVE-2026-68898: Microsoft Windows iSCSI out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-68898-microsoft-windows-iscsi-out-of-bounds-read  
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-2026-68898 · Severity: medium · CVSS 6.5 · Published 2026-09-08

Windows iSCSI is a network protocol used for storage connectivity. An attacker can exploit an out-of-bounds read vulnerability in the iSCSI implementation to cause the system to crash or become unresponsive, disrupting network storage access and potentially causing service outages.

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

## Quick answers

**Is CVE-2026-68898 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-68898 being exploited in the wild.

**How severe is CVE-2026-68898?** Medium severity, with a CVSS score of 6.5, published 8 September 2026.

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

**Is there a fix for CVE-2026-68898?** 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-2026-68898 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-68898?** Check whether you run Microsoft Windows iSCSI 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

An out-of-bounds read vulnerability exists in the Windows iSCSI subsystem that allows an unauthenticated attacker to send a specially crafted network packet triggering a memory access violation. The vulnerability can be exploited over the network without prior authentication. A successful exploit results in denial of service through system crash or hang, disrupting iSCSI storage connectivity and availability. A patch has been published by Microsoft to address this issue.

## Affected products

- Microsoft Windows iSCSI <UNKNOWN>

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68898](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68898)

## 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 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)