XML External Entity injection in PowerShell - CVE-2026-121675
Published: November 11, 2026
Vulnerability identifier: #VU165806
CSH Severity: Medium
CVSS v4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2026-121675
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information, including credentials.
The vulnerability exists due to improper restriction of XML external entity references in Microsoft PowerShell when processing XML content. A remote attacker can supply crafted XML containing external entity references to disclose credentials, with exploitation requiring user interaction.
Affected software
PowerShell
How to mitigate CVE-2026-121675
Install security update from vendor's website.
PowerShell - addressed in versions 7.6.10, 7.7.0