SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2021-3183

Files.com Fat Client 3.3.6 allows authentication bypass because the client continues to have access after a logout and a removal of a login profile.

HIGH 7.5EPSS 1.44%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.44%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Files.com Fat Client 3.3.6 allows authentication bypass because the client continues to have access after a logout and a removal of a login profile.

CVSS 3.1
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
1.44% probability · 73th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-613
Affected
files/fat client
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 1.44%26 October 202626 October 2026

EPSS 1.4% 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.

References

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