CVE-2026-15966Network attack vector

Authenticated-session abuse via permissive cross-origin policy

Published Jul 23, 2026 · Updated Jul 23, 2026

Permissive CORS handling in MOVEit Transfer before 2025.1.5 and 2026.0.0 through 2026.0.2 allows remote attackers to abuse authenticated sessions. The WebUI accepts cross-origin access from untrusted domains, but Progress has not disclosed the affected request path or the exact policy-processing error. Exploitation requires user interaction with attacker-controlled content while an authenticated session is active, and the published record does not specify which session-bound data or actions are exposed.

CVSS severity7.5
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Permissive CORS handling in MOVEit Transfer before 2025.1.5 and 2026.0.0 through 2026.0.2 allows remote attackers to abuse authenticated sessions. The WebUI accepts cross-origin access from untrusted domains, but Progress has not disclosed the affected request path or the exact policy-processing error. Exploitation requires user interaction with attacker-controlled content while an authenticated session is active, and the published record does not specify which session-bound data or actions are exposed.

The record

CVE
CVE-2026-15966
Published
Jul 23, 2026
Updated
Jul 23, 2026
Vendor
Progress Software Corporation
Product
MOVEit Transfer
Classifications
CWE-942, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2025.1.5
  2. Affected versionversion=2026.0.0 <2026.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Progress Software Corporation · MOVEit Transferversion=0 <2025.1.5; version=2026.0.0 <2026.0.3

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5Progress Software CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Permissive Cross-domain Policy with Untrusted Domains
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo