CVE-2021-20372: IBM Sterling b2b Integrator

Medium severity, CVSS 4.3. EPSS: 1.2% chance of exploitation in the next 30 days.

IBM Sterling File Gateway 2.2.0.0 through 6.1.1.0 could allow a remote authenticated user to cause a denial of another user's service due to insufficient permission checking. IBM X-Force ID: 195518.

Affected products

• IBM Sterling b2b Integrator: from 2.2.0.0, up to and including 5.2.6.5_3; from 6.0.0.0, up to and including 6.0.0.6; from 6.0.1.0, up to and including 6.0.3.4; from 6.1.0.0, up to and including 6.1.0.1

Published 2021-10-07. Last modified 2026-06-17.