Security readout for executives and security teams
Plain-English summary
IBM Edge 4.2 may leave locally stored web pages readable by another user on the same system. The business impact is limited confidentiality exposure, most relevant on shared workstations, jump hosts, kiosks, or environments with multiple local users.
Executive priority
Handle through normal vulnerability management unless IBM Edge 4.2 is used on shared or sensitive systems. Prioritize faster where stored pages may contain customer data, credentials, internal applications, or regulated information.
Technical view
The CVE describes an information disclosure flaw in IBM Edge 4.2. CVSS v3.0 score is 4.0, with local attack vector, low complexity, no privileges required, no user interaction, and low confidentiality impact only.
Likely exposure
Exposure appears limited to systems running IBM Edge 4.2 where multiple local users can access the same host or stored local data. The source bundle does not identify other affected IBM products or versions.
Exploitation context
The CVE is not listed as KEV, and the supplied sources do not report active exploitation. The CVSS vector marks exploit code maturity as unproven, so treat exploitation evidence as incomplete rather than confirmed.
Researcher notes
Evidence is narrow: IBM Edge 4.2, information disclosure, IBM X-Force ID 189633, CVSS 4.0. No CWE, patch details, exploit details, or broader product matrix are provided in the source bundle.
Mitigation direction
- Identify systems running IBM Edge 4.2.
- Review IBM advisory and X-Force entry for official remediation.
- Apply vendor-recommended updates or configuration changes.
- Reduce shared local account use on affected systems.
- Clear sensitive locally stored pages where operationally appropriate.
Validation and detection
- Confirm IBM Edge version on potentially affected hosts.
- Check whether systems are shared by multiple local users.
- Review local storage permissions for cached or saved pages.
- Verify remediation against IBM guidance after changes.
- Document residual exposure where upgrades are not possible.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-4809 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/UI:N/S:U/I:N/A:N/C:L/AV:L/PR:N/AC:L/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/UI:N/S:U/I:N/A:N/C:L/AV:L/PR:N/AC:L/E:U/RL:O/RC:C2.51.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4MediumVector: CVSS:3.0/UI:N/S:U/I:N/A:N/C:L/AV:L/PR:N/AC:L/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/6491631CVE reference · x_refsource_CONFIRM
- ibm-edge-cve20204809-info-disc (189633)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.