What’s Vulnerable › Vulnerabilities

CVE-2021-27771: HCL Sametime is susceptible a file transfer service vulnerability

• Severity: high (CVSS 7.6 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-22

Description

User SID can be modified resulting in an Arbitrary File Upload or deletion of directories causing a Denial of Service. When interacting in a normal matter with the Sametime chat application, users hold a cookie containing their session ID (SID). This value is also used when sending chat messages, receiving notifications and/or transferring files.

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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