CVE-2024-28214Public exploitNetwork attack vector

Unauthenticated service interruption via unbounded request delays

Published Mar 7, 2024 · Updated Nov 8, 2024

Denial of service in the nGrinder controller before 3.5.9 allows remote attackers to interrupt its web service via crafted HTTP requests. The /check/healthcheck_slow endpoint passes an unrestricted delay value to ThreadUtils.sleep, keeping each request-processing thread occupied. No authentication is required, and enough concurrent requests with large delays exhaust the Tomcat thread pool and block the controller web service.

CVSS severity2.7
Low
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the nGrinder controller before 3.5.9 allows remote attackers to interrupt its web service via crafted HTTP requests. The /check/healthcheck_slow endpoint passes an unrestricted delay value to ThreadUtils.sleep, keeping each request-processing thread occupied. No authentication is required, and enough concurrent requests with large delays exhaust the Tomcat thread pool and block the controller web service.

The record

CVE
CVE-2024-28214
Published
Mar 7, 2024
Updated
Nov 8, 2024
Vendor
NAVER Corporation
Product
nGrinder
Classifications
CWE-405, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 8, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NAVER Corporation · nGrinderAffected versions are unavailable in this record.

Published CVSS scores

2.7CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-405Asymmetric Resource Consumption (Amplification)
T1499.003Application Exhaustion Flood

Public exploit references

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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