CVE-2021-20396

Local information disclosure via cacheable SSL pages

Published Jun 11, 2021 · Updated Sep 17, 2024

Information disclosure in IBM Security QRadar Analyst Workflow 1.0 through 1.18.0 allows local users to read cached web pages via shared local storage. The application stores pages received over SSL in a local cache without preventing access by another account on the QRadar host. Exploitation requires local access to the system; the documented impact is confidentiality loss of cached page contents, with no integrity or availability effect reported.

CVSS severity4.0
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in IBM Security QRadar Analyst Workflow 1.0 through 1.18.0 allows local users to read cached web pages via shared local storage. The application stores pages received over SSL in a local cache without preventing access by another account on the QRadar host. Exploitation requires local access to the system; the documented impact is confidentiality loss of cached page contents, with no integrity or availability effect reported.

The record

CVE
CVE-2021-20396
Published
Jun 11, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
IBM Security QRadar Analyst Workflow
Classifications
CWE-922, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0
  2. Affected versionversion=1.18.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · IBM Security QRadar Analyst Workflowversion=1.0; version=1.18.0

Published CVSS scores

3.5IBMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C
4.0IBMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.3NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.1NVDAV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-922Insecure Storage of Sensitive Information
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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