AUGUST 4, 2026
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Case File

CVE-2021-27771

HIGH · CVSS 8.2 EPSS 0.70%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-05-12 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.2. It may lead to a denial-of-service condition.

CVE
CVE-2021-27771
Severity
HIGH
CVSS
8.2
EPSS
0.70%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)