CVE-2021-39027Network attack vector

Message integrity alteration via improper output encoding

Published May 6, 2022 · Updated Sep 17, 2024

Improper output encoding in IBM Guardium Data Encryption 4.0.0 and 5.0.0 allows remote authenticated users to alter structured messages. The CipherTrust Tokenization Server component constructs an intercomponent message without correctly encoding or escaping data, so its intended structure is not preserved. Exploitation requires low-privileged network access and user interaction; IBM reports integrity impact only but does not disclose the affected fields or resulting state change.

CVSS severity3.0
Low
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper output encoding in IBM Guardium Data Encryption 4.0.0 and 5.0.0 allows remote authenticated users to alter structured messages. The CipherTrust Tokenization Server component constructs an intercomponent message without correctly encoding or escaping data, so its intended structure is not preserved. Exploitation requires low-privileged network access and user interaction; IBM reports integrity impact only but does not disclose the affected fields or resulting state change.

The record

CVE
CVE-2021-39027
Published
May 6, 2022
Updated
Sep 17, 2024
Vendor
IBM
Product
Guardium Data Encryption
Classifications
CWE-116
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 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?

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  1. Affected versionversion=4.0.0
  2. Affected versionversion=5.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Guardium Data Encryptionversion=4.0.0; version=5.0.0

Published CVSS scores

3.0IBM CorporationCVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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