CVE-2023-1388Network attack vector

Service interruption via macmnsvc heap overflow

Published Jun 7, 2023 · Updated Jan 6, 2025

Heap-based overflow in Trellix Agent 5.7.8 for macOS allows remote attackers to make the macmnsvc service unavailable. The macmnsvc process writes attacker-influenced data beyond a heap allocation, corrupting its page heap until the service fails. Trellix's assessment requires user interaction but does not disclose the triggering request or interaction path; the bounded consequence is an agent-service interruption.

CVSS severity6.3
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based overflow in Trellix Agent 5.7.8 for macOS allows remote attackers to make the macmnsvc service unavailable. The macmnsvc process writes attacker-influenced data beyond a heap allocation, corrupting its page heap until the service fails. Trellix's assessment requires user interaction but does not disclose the triggering request or interaction path; the bounded consequence is an agent-service interruption.

The record

CVE
CVE-2023-1388
Published
Jun 7, 2023
Updated
Jan 6, 2025
Vendor
Trellix
Product
Trellix Agent
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Trellix · Trellix Agentversion=5.7.8

Published CVSS scores

6.3TrellixCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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