CVE-2021-29772Network attack vector

Unauthenticated code injection via unsanitized input

Published Aug 26, 2021 · Updated Sep 17, 2024

Code injection in IBM API Connect 5.0.0.0 through 5.0.8.11 allows remote attackers to execute injected code through network input. The Management server accepts unsanitized user input that is interpreted as injected code, but IBM has not disclosed the affected endpoint, parameter, or code path. Network access is sufficient and no authentication or user interaction is required; the execution context and attainable actions remain undisclosed.

CVSS severity5.6
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in IBM API Connect 5.0.0.0 through 5.0.8.11 allows remote attackers to execute injected code through network input. The Management server accepts unsanitized user input that is interpreted as injected code, but IBM has not disclosed the affected endpoint, parameter, or code path. Network access is sufficient and no authentication or user interaction is required; the execution context and attainable actions remain undisclosed.

The record

CVE
CVE-2021-29772
Published
Aug 26, 2021
Updated
Sep 17, 2024
Vendor
IBM
Product
API Connect
Classifications
CWE-94, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 26, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0.0.0
  2. Affected versionversion=5.0.8.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · API Connectversion=5.0.0.0; version=5.0.8.11

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.6IBM CorporationCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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-94Improper Control of Generation of Code ('Code Injection')
T1190Exploit Public-Facing Application

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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