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Status published
High
CVE-2021-27771
HCL Sametime is susceptible a file transfer service vulnerability
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
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Affected Vendor
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View all reports →Affected Software
Sametime
Vulnerable Versions:
11.6
Timeline
Official Publish:
May 12th, 2022
Last Modified:
September 17th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:H
MITRE ATT&CK TTPs
T1190
Exploit Public-Facing Application
Initial Access
T1505.003
Web Shell
Persistence
T1105
Ingress Tool Transfer
Command and Control
T1059
Command and Scripting Interpreter
Execution
T1565.002
Stored Data Manipulation
Impact
T1005
Data from Local System
Collection
T1552
Unsecured Credentials
Credential Access
T1565.001
Stored Data Manipulation
Impact