CVE-2021-29755Network attack vector

Inter-host data disclosure via improper certificate validation

Published Jul 20, 2022 · Updated Sep 17, 2024

Improper certificate validation in IBM QRadar SIEM 7.3, 7.4, and 7.5 allows remote attackers to read inter-host communications. IBM has not disclosed the affected protocol or validation routine; the communication path fails to validate a peer certificate properly. Exploitation is unauthenticated over the network but requires a difficult interception condition, and the reported consequence is confidential data exposure without integrity or availability impact.

CVSS severity5.9
Medium
EPSS probability0.50%
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 QRadar SIEM 7.3, 7.4, and 7.5 allows remote attackers to read inter-host communications. IBM has not disclosed the affected protocol or validation routine; the communication path fails to validate a peer certificate properly. Exploitation is unauthenticated over the network but requires a difficult interception condition, and the reported consequence is confidential data exposure without integrity or availability impact.

The record

CVE
CVE-2021-29755
Published
Jul 20, 2022
Updated
Sep 17, 2024
Vendor
IBM
Product
QRadar SIEM
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2022CVE 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=7.3.0
  2. Affected versionversion=7.3.3.FixPack11
  3. Affected versionversion=7.4.0
  4. Affected versionversion=7.4.3.FixPack5
  5. Affected versionversion=7.5.0
  6. Affected versionversion=7.5.0.UpdatePack1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · QRadar SIEMversion=7.3.0; version=7.3.3.FixPack11; version=7.4.0; version=7.4.3.FixPack5; version=7.5.0; version=7.5.0.UpdatePack1

Published CVSS scores

5.9IBM CorporationCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST National Vulnerability DatabaseCVSS: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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

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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