CVE-2021-20435

Local information disclosure via improper certificate validation

Published Sep 23, 2021 · Updated Sep 16, 2024

Improper certificate validation in IBM Security Verify Bridge 1.0.5.0 allows local users to obtain sensitive information. IBM has not disclosed the affected certificate-validation path or how an invalid certificate causes information to be exposed. Low-privilege local access is required, and the reported consequence is limited to disclosure that can aid further attacks, with no reported data modification or service interruption.

CVSS severity2.5
Low
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in IBM Security Verify Bridge 1.0.5.0 allows local users to obtain sensitive information. IBM has not disclosed the affected certificate-validation path or how an invalid certificate causes information to be exposed. Low-privilege local access is required, and the reported consequence is limited to disclosure that can aid further attacks, with no reported data modification or service interruption.

The record

CVE
CVE-2021-20435
Published
Sep 23, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Verify Bridge
Classifications
CWE-295
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=1.0.5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

IBM · IBM Verify Bridgeversion=1.0.5.0

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.5IBM CorporationCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.2IBM CorporationCVSS:3.0/S:U/AV:L/PR:L/AC:H/A:N/C:L/UI:N/I:N/RC:C/RL:O/E:U

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation

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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