This vulnerability (CVE-2026-15967) in Progress MOVEit Transfer is classified as CWE-613 (Insufficient Session Expiration). It affects MOVEit Transfer versions before 2025.1.5 and versions starting at 2026.0.0 up to but excluding 2026.0.3. The issue involves sessions that do not expire as intended, which could allow unauthorized continued access. The CVSS v3.1 base score is 7.5, indicating a high severity with network attack vector, high complexity, no privileges required, user interaction required, and impacts to confidentiality, integrity, and availability. There is no vendor advisory or patch information provided, and the remediation level is not specified.

If exploited, this vulnerability could allow attackers to maintain unauthorized access to the MOVEit Transfer system by leveraging sessions that do not expire properly. This can lead to high impact on confidentiality, integrity, and availability of the system and its data. No known exploits are reported in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor Progress's advisories for updates. Until a patch is available, consider minimizing exposure by limiting session lifetimes through configuration if possible and enforcing strict session management policies.