SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-20764

Improper input validation vulnerability in Attaching Files of Cybozu Garoon 4.0.0 to 5.0.2 allows a remote attacker to alter the data of Attaching Files.

MEDIUM 5.3EPSS 0.99%

Does this matter?

Lower severity and a low EPSS score (0.99%). Track it; it rarely justifies an emergency change on its own.

Description

Improper input validation vulnerability in Attaching Files of Cybozu Garoon 4.0.0 to 5.0.2 allows a remote attacker to alter the data of Attaching Files.

CVSS 3.1
5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
0.99% probability · 62th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-20
Affected
cybozu/garoon
Source
vultures@jpcert.or.jp
EPSS trend
0%3%5%26 October 2026: 0.99%26 October 202626 October 2026

EPSS 1.0% since 26 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.