CVE-2023-28872Public exploit

SYSTEM code execution via Support Assistant symlink

Published Dec 25, 2023 · Updated Aug 27, 2024

Privilege escalation in NCP Secure Enterprise Client before 13.10 allows local users to execute arbitrary DLLs with SYSTEM privileges. Support Assistant follows a symlink from its user-controlled NcpSupport temporary directory and grants the invoking user write access to ncppki.conf, whose DLLWIN95 and DLLWINNT paths feed privileged services. A low-privileged Windows account must launch and restart Support Assistant, replace those paths, and wait for or trigger a privileged DLL load.

CVSS severity8.8
High
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in NCP Secure Enterprise Client before 13.10 allows local users to execute arbitrary DLLs with SYSTEM privileges. Support Assistant follows a symlink from its user-controlled NcpSupport temporary directory and grants the invoking user write access to ncppki.conf, whose DLLWIN95 and DLLWINNT paths feed privileged services. A low-privileged Windows account must launch and restart Support Assistant, replace those paths, and wait for or trigger a privileged DLL load.

The record

CVE
CVE-2023-28872
Published
Dec 25, 2023
Updated
Aug 27, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-59, CWE-284, T1574.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-284Improper Access Control
T1574.002DLL Side-Loading

Public exploit references

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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