SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityDeferred

CVE-2026-107171

An Hardcoded Cryptographic Key vulnerability existed in Trellix Agent 5.8.4 via mfecryptc.dll leads to Database Decryption by Regular Users.

MEDIUM 6.9EPSS 0.13%

Does this matter?

Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.

Description

An Hardcoded Cryptographic Key vulnerability existed in Trellix Agent 5.8.4 via mfecryptc.dll leads to Database Decryption by Regular Users.

CVSS 4.0
6.9 MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS
0.13% probability · 2th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-321
Source
trellixpsirt@trellix.com
EPSS trend
0%3%5%14 October 2026: 0.12%26 October 2026: 0.13%14 October 202626 October 2026

EPSS moved from 0.1% on 14 October 2026 to 0.1% on 26 October 2026.

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