CVE-2020-4805

Local information disclosure via cached web pages

Published Sep 23, 2021 · Updated Sep 17, 2024

Cache-control failure in IBM Edge 4.2 allows local users to read web pages stored on the system by another user without authorization. IBM has not disclosed the responsible component or specific cache-control error; published details establish only that page content persists in locally readable storage. Exploitation requires local system access and exposes cached page content, with no reported integrity or availability impact.

CVSS severity3.3
Low
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

Cache-control failure in IBM Edge 4.2 allows local users to read web pages stored on the system by another user without authorization. IBM has not disclosed the responsible component or specific cache-control error; published details establish only that page content persists in locally readable storage. Exploitation requires local system access and exposes cached page content, with no reported integrity or availability impact.

The record

CVE
CVE-2020-4805
Published
Sep 23, 2021
Updated
Sep 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-922, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0IBMCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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