SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-27773

This vulnerability allows users to execute a clickjacking attack in the meeting's chat.

MEDIUM 4.3EPSS 0.47%

Does this matter?

Lower severity and a low EPSS score (0.47%). Track it; it rarely justifies an emergency change on its own.

Description

This vulnerability allows users to execute a clickjacking attack in the meeting's chat.

CVSS 3.1
4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
EPSS
0.47% probability · 40th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-451, CWE-1021
Affected
hcltech/sametime
Source
psirt@hcl.com
EPSS trend
0%3%5%27 October 2026: 0.47%27 October 202627 October 2026

EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.