CVE-2021-27769Network attack vector

Unauthenticated information disclosure

Published May 12, 2022 · Updated Sep 16, 2024

Information disclosure in HCL Sametime 11.6 allows remote attackers to obtain data that can aid further attacks via web requests. HCL maps the flaw to external control of an assumed-immutable web parameter but has not disclosed the affected parameter, request path, or code operation. The interface is reachable without authentication or user interaction, and the published impact is limited to information exposure rather than data changes or service interruption.

CVSS severity5.3
Medium
EPSS probability0.76%
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 Sametime 11.6 allows remote attackers to obtain data that can aid further attacks via web requests. HCL maps the flaw to external control of an assumed-immutable web parameter but has not disclosed the affected parameter, request path, or code operation. The interface is reachable without authentication or user interaction, and the published impact is limited to information exposure rather than data changes or service interruption.

The record

CVE
CVE-2021-27769
Published
May 12, 2022
Updated
Sep 16, 2024
Vendor
HCL Software
Product
HCL Sametime
Classifications
CWE-472
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=11.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL Sametimeversion=11.6

Published CVSS scores

5.3HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/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-472External Control of Assumed-Immutable Web Parameter

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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