CVE-2026-15966 Progress CVE debrief

Who should care

Organizations using Progress MOVEit Transfer before 2025.1.5 or from 2026.0.0 before 2026.0.3 should review and apply patches to mitigate the vulnerability. This includes operators, platform administrators, vulnerability management teams, and security teams who need to assess the impact of this vulnerability on their systems and take necessary actions.

Technical summary

A permissive cross-domain security policy with untrusted domains vulnerability exists in Progress MOVEit Transfer. This issue affects MOVEit Transfer: before 2025.1.5, from 2026.0.0 before 2026.0.3. The vulnerability has a CVSS score of 7.5 and a severity of HIGH. Organizations using Progress MOVEit Transfer should review and apply patches to mitigate the vulnerability.

Defensive priority

High priority due to the HIGH severity CVSS score and potential impact on security. Organizations should prioritize patching and implementing additional security measures to restrict cross-domain interactions.

Recommended defensive actions

• Review and apply patches for MOVEit Transfer to version 2025.1.5 or later, or 2026.0.3 or later.
• Implement additional security measures to restrict cross-domain interactions.
• Monitor for suspicious activity related to MOVEit Transfer.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

Evidence is based on the CVE record and NVD details. Limited information is available about the specific impacts and affected systems. The CVE record was published on 2026-07-23T21:17:02.860Z and has not been modified since then. The vulnerability has a CVSS score of 7.5 and a severity of HIGH. Organizations should review the CVE record and NVD details for further information.

Official resources