CVE-2021-20538

mediumpriority · track · 36OT risk · elevatedEPSS 0.007 · 54 %ileEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.74% (54th) EPSS
CVSS 6.4 · medium
Is it mine?
4 products
Check your exposure
Who says so?
3 sources
cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

IBM Cloud Pak for Security (CP4S) 1.5.0.0 and 1.5.0.1 could allow a user to obtain sensitive information or perform actions they should not have access to due to incorrect authorization mechanisms. IBM X-Force ID: 198919.

01

cvss

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

9.1
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 4.8–9.1

v2.06.4mediumAV:N/AC:L/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 4.9
v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 5.2
v3.04.8mediumCVSS:3.0/I:L/PR:N/AC:H/AV:N/S:U/C:L/UI:N/A:N/E:U/RL:O/RC:Csecondary · ENISA EU
v3.04.8mediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondary · psirt@us.ibm.com USexploitability 2.2 · impact 2.5
v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USprimary
03

affected products (4)

Products and version ranges known to be affected.

04

also known as (3)

Other names and identifiers for this entity.

05

sources

Which sources assert this record, and when.

cnnvdenisa_euvdnvdNVDCVE.orgMITRE
published 2021-05-10modified 2026-06-17
07

references (7)

External citations — patches, advisories, analysis.

scry

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