CVE-2020-4821

mediumpriority · track · 40EPSS 0.020 · 81 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.00% (81st) EPSS

CVSS 6.8 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.9–9.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.05.9mediumCVSS:3.0/AC:H/A:N/C:H/S:U/AV:N/PR:N/UI:N/I:N/RL:O/RC:C/E:Usecondary · ENISA EU

v3.05.9mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · psirt@us.ibm.com USexploitability 2.2 · impact 3.6

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-287US

affected products (9)

Products and version ranges known to be affected.

IBM InfoSphere Change Data Capture for z/OS≤ 10.2.1enisa_euvdEU
IBM InfoSphere Data Replication≤ 11.4enisa_euvdEU
IBM Corp. InfoSphere Change Data Capture≤ 10.2.1fstec_bduRU
IBM Corp. InfoSphere Data Replication≤ 11.4fstec_bduRU
ibm infosphere change data capture= 10.2.1nvdUScpe:2.3:a:ibm:infosphere_change_data_capture:*:*:*:*:*:*:*:*
ibm infosphere change data capture= 11.3.3nvdUScpe:2.3:a:ibm:infosphere_change_data_capture:*:*:*:*:*:*:*:*
ibm infosphere change data capture= 11.4nvdUScpe:2.3:a:ibm:infosphere_change_data_capture:*:*:*:*:*:*:*:*
ibm infosphere data replication= 11.4nvdUScpe:2.3:a:ibm:infosphere_data_replication:*:*:*:*:*:*:*:*
ibm infosphere data replication= 11.4.0nvdUScpe:2.3:a:ibm:infosphere_data_replication:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-07-16modified 2026-06-17

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+7711 more

references (10)

External citations — patches, advisories, analysis.

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