CVE-2026-21758Network attack vector

Sensitive host-environment information disclosure

Published Aug 25, 2026 · Updated Aug 25, 2026

Information disclosure in HCL Hive Telco Observability 1.0 allows remote attackers to gather sensitive host-environment data. HCL has not published the affected component or the operation that causes host-environment information to be returned to an untrusted request. The unauthenticated network path requires a high-complexity condition; successful exploitation discloses information without changing data or interrupting service.

CVSS severity3.7
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in HCL Hive Telco Observability 1.0 allows remote attackers to gather sensitive host-environment data. HCL has not published the affected component or the operation that causes host-environment information to be returned to an untrusted request. The unauthenticated network path requires a high-complexity condition; successful exploitation discloses information without changing data or interrupting service.

The record

CVE
CVE-2026-21758
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
HCL Software
Product
HCL Hive Telco Observability
Classifications
CWE-200, T1592
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

3.7HCL SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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-200Exposure of Sensitive Information to an Unauthorized Actor
T1592Gather Victim Host Information

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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