CVE-2021-38864

Sensitive-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 attackers to obtain sensitive information via adjacent-network access. IBM has not published which certificate is accepted, which validation check is omitted, or which Bridge connection exposes the flaw. Exploitation requires adjacent-network access and high complexity; the reported consequence is sensitive-information disclosure, with no integrity or availability impact.

CVSS severity7.5
High
EPSS probability0.71%
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 attackers to obtain sensitive information via adjacent-network access. IBM has not published which certificate is accepted, which validation check is omitted, or which Bridge connection exposes the flaw. Exploitation requires adjacent-network access and high complexity; the reported consequence is sensitive-information disclosure, with no integrity or availability impact.

The record

CVE
CVE-2021-38864
Published
Sep 23, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Verify Bridge
Classifications
CWE-295
Attack vector
adjacent
Privileges
unauthenticated

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 vectoradjacent
Required privilegesunauthenticated

What is affected?

IBM · IBM Verify Bridgeversion=1.0.5.0

Published CVSS scores

5.0National Institute of Standards and TechnologyAV:N/AC:L/Au:N/C:P/I:N/A:N
6.1IBM CorporationCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
5.3IBM CorporationCVSS:3.0/PR:N/AV:A/S:C/UI:N/C:H/I:N/A:N/AC:H/RC:C/RL:O/E:U
7.5National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
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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