# CVE-2026-121675: Microsoft PowerShell XML external entity information disclosure

Source: https://junglewise.ai/threats/cve-2026-121675-improper-restriction-of-xml-external-entity-reference-in  
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-2026-121675 · Severity: medium · CVSS 6.1 · Published 2026-11-10

Microsoft PowerShell, a command-line shell used by IT administrators to manage Windows systems and infrastructure, improperly handles XML files that may contain external entity references. An attacker with network access can exploit this to read sensitive files and configuration data from affected systems.

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

## Quick answers

**Is CVE-2026-121675 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121675 being exploited in the wild.

**How severe is CVE-2026-121675?** Medium severity, with a CVSS score of 6.1, published 10 November 2026.

**Which products and versions are affected?** Microsoft PowerShell.

**Is there a fix for CVE-2026-121675?** 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-2026-121675 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-121675?** Check whether you run Microsoft PowerShell. 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

The vulnerability is an XML external entity (XXE) injection flaw in PowerShell's XML parsing functionality. An attacker can craft a malicious XML document that, when processed by PowerShell, allows disclosure of arbitrary files accessible to the PowerShell process. No authentication or user interaction is required beyond sending a network request to a vulnerable system.

## Affected products

- Microsoft PowerShell

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121675](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121675)

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