IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a us…

published 2021-07-16 5y ago modified 2026-06-17 4mo ago also EUVD-2020-26068

cvss: 5.9; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

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

Patch / fix

links 2

ibm.com/support/pages/node/6472911 advisory
ibm.com/support/pages/node/6472909 advisory

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Exploit prediction

2.00% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	5.9	CVSS:3.0/AC:H/A:N/C:H/S:U/AV:N/PR:N/UI:N/I:N/RL:O/RC:C/E:U
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.0	5.9	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

IBM InfoSphere Change Data Capture for z/OS
IBM InfoSphere Data Replication

Classification

Weakness

CWE-287 Improper Authentication

References

ibm.com /support/pages/node/6472911
patch, vendor-advisory
ibm.com /support/pages/node/6472909
patch, vendor-advisory
exchange.xforce.ibmcloud.com /vulnerabilities/189834
vdb-entry, vendor-advisory

Sources

CVE List CVE-2020-4821
NVD CVE-2020-4821

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