What is CVE-2026-18668?

CVE-2026-18668 is a medium-severity vulnerability in IBM Sterling File Gateway, classified under Protection Mechanism Failure. CVSS score: 6.5/10. Published 2026-11-08.

How severe is CVE-2026-18668?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in IBM Sterling File Gateway

CVE-2026-18668

IBM Sterling File Gateway 6.2.1.0 through 6.2.1.2_1 and 6.2.2.0 - 6.2.2.1_1 could allow a remote attacker to perform protocol downgrade attacks due to a security misconfiguration.

Published 2026-11-08 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Sterling File Gateway

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

www.ibm.com/support/pages/node/7294084 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-18668?: CVE-2026-18668 is a medium-severity vulnerability in IBM Sterling File Gateway, classified under Protection Mechanism Failure. CVSS score: 6.5/10. Published 2026-11-08.
How severe is CVE-2026-18668?: Medium severity. CVSS v3 base score is 6.5 out of 10.