CVE-2021-27772: HCL Sametime is vulnerable to an information disclosure

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-05-12 · updated 2026-06-17
Weakness: CWE-285

Description

Users are able to read group conversations without actively taking part in them. Next to one to one conversations, users are able to start group conversations with multiple users. It was found possible to obtain the contents of these group conversations without being part of it. This could lead to information leakage where confidential information discussed in private groups is read by other users without the users knowledge.

Affected products

HCL Software Sametime: 11.6

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0097430

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