{"cve":"CVE-2020-4821","nvd":{"published":"2021-07-16T17:15:11.993","modified":"2026-06-17T03:20:30.780","status":"Modified","description":"IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a user to bypass authentication mechanisms using an empty password string. IBM X-Force ID: 189834","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://exchange.xforce.ibmcloud.com/vulnerabilities/189834","https://www.ibm.com/support/pages/node/6472909","https://www.ibm.com/support/pages/node/6472911","https://exchange.xforce.ibmcloud.com/vulnerabilities/189834","https://www.ibm.com/support/pages/node/6472909"],"products":["ibm:infosphere_change_data_capture","ibm:infosphere_data_replication"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2020-4821","score":0.02002,"percentile":0.80776,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}