CVE-2026-3428

Administrator escalation via update payload substitution

Published Apr 16, 2026 · Updated Apr 16, 2026

Local privilege escalation in ASUS Member Center 1.6.6.4 and earlier allows local users to execute substituted update payloads as Administrator. The update modules leave a post-download window in which the expected payload can be replaced without an integrity check before execution. Exploitation requires low-privileged local access, precise timing during an update, and user consent; a successful payload gains administrative execution.

CVSS severity5.4
Medium
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in ASUS Member Center 1.6.6.4 and earlier allows local users to execute substituted update payloads as Administrator. The update modules leave a post-download window in which the expected payload can be replaced without an integrity check before execution. Exploitation requires low-privileged local access, precise timing during an update, and user consent; a successful payload gains administrative execution.

The record

CVE
CVE-2026-3428
Published
Apr 16, 2026
Updated
Apr 16, 2026
Vendor
ASUSTeK Computer Inc.
Product
ASUS Member Center
Classifications
CWE-494, CWE-367, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2026Record 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=1.6.6.4 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ASUSTeK Computer Inc. · ASUS Member Centerversion=1.6.6.4 and earlier

Published CVSS scores

5.4ASUSCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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-494Download of Code Without Integrity Check
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
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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