CVE-2026-21753Network attack vector

Data exposure and modification via unmaintained dependencies

Published Aug 25, 2026 · Updated Aug 25, 2026

Use of unmaintained third-party components in HCL Hive V1.0 allows remote attackers to expose or modify application data. HCL identifies weak software supply chain governance as the locus but does not name any dependency, package, code path, or unsafe operation. Exploitation requires user interaction and conditions outside the attacker's control; the published impact is limited to confidentiality and integrity.

CVSS severity4.2
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of unmaintained third-party components in HCL Hive V1.0 allows remote attackers to expose or modify application data. HCL identifies weak software supply chain governance as the locus but does not name any dependency, package, code path, or unsafe operation. Exploitation requires user interaction and conditions outside the attacker's control; the published impact is limited to confidentiality and integrity.

The record

CVE
CVE-2026-21753
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
HCL Software
Product
HCL Hive Telco Observability
Classifications
CWE-1104, T1195.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record 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=V1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL Hive Telco Observabilityversion=V1.0

Published CVSS scores

4.2HCL SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1104Use of Unmaintained Third Party Components
T1195.001Compromise Software Dependencies and Development Tools

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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