What is CVE-2026-0977?

CVE-2026-0977 is a medium-severity vulnerability in Ibm Cics Transaction Gateway, classified under Improper Access Control. CVSS score: 5.1/10. Published 2026-03-16.

How severe is CVE-2026-0977?

Medium severity. CVSS v3 base score is 5.1 out of 10.

Vulnerability in Ibm Cics Transaction Gateway

CVE-2026-0977

IBM CICS Transaction Gateway for Multiplatforms 9.3 and 10.1 could allow a user to transfer or view files due to improper access controls.

EPSS: 0.002 (10.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Ibm Cics_transaction_gateway — versions 9.3, 10.1
Ibm Cics Transaction Gateway For Multiplatforms — versions 9.3, 10.1

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-0977?: CVE-2026-0977 is a medium-severity vulnerability in Ibm Cics Transaction Gateway, classified under Improper Access Control. CVSS score: 5.1/10. Published 2026-03-16.
How severe is CVE-2026-0977?: Medium severity. CVSS v3 base score is 5.1 out of 10.