CVE-2023-5623

Local privilege escalation via weak install ACLs

Published Oct 26, 2023 · Updated Sep 9, 2024

Incorrect installation-directory ACLs in Tenable Network Monitor before 6.3.0 allow local users to execute arbitrary code with SYSTEM privileges. The installer leaves a non-standard installation directory writable or otherwise insufficiently restricted, allowing a low-privileged user to place executable content that a SYSTEM-context NNM process can run. Exploitation requires local low-privilege access and a non-standard install location; the consequence is full code execution under SYSTEM on the Windows host.

CVSS severity7.0
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect installation-directory ACLs in Tenable Network Monitor before 6.3.0 allow local users to execute arbitrary code with SYSTEM privileges. The installer leaves a non-standard installation directory writable or otherwise insufficiently restricted, allowing a low-privileged user to place executable content that a SYSTEM-context NNM process can run. Exploitation requires local low-privilege access and a non-standard install location; the consequence is full code execution under SYSTEM on the Windows host.

The record

CVE
CVE-2023-5623
Published
Oct 26, 2023
Updated
Sep 9, 2024
Vendor
Tenable
Product
Tenable Network Monitor
Classifications
CWE-94, CWE-276, CAPEC-233, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2024Record 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=0 <6.3.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Tenable · Tenable Network Monitorversion=0 <6.3.0

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Tenable Network Security, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code
CWE-276Incorrect Default Permissions
CAPEC-233Privilege Escalation
T1068Exploitation for Privilege Escalation

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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