Endpoint Security and HX
CVE-2023-1388: Heap-based overflow in Trellix Agent
A heap-based overflow vulnerability in TA prior to version 5.7.9 allows a remote user to alter the page heap in the macmnsvc process memory block, resulting in the service becoming unavailable.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 6.3
EPSS0.57%Chance of exploitation in 30 days
Public exploitNot tracked
FixSee advisory
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Trellix Agent (MacOS) 5.7 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A heap-based overflow vulnerability in TA prior to version 5.7.9 allows a remote user to alter the page heap in the macmnsvc process memory block, resulting in the service becoming unavailable.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.