CVE-2026-12489: Medium severity Zyxel Ex3501-t0 vulnerability
Published Oct 20, 2026
·Updated
An incorrect authorization vulnerability in the Data Access Layer (DAL) of Zyxel EX3501-T0 firmware versions through 5.44(ACHR.6)C0 could allow an authenticated attacker to escalate privileges by modifying the loginprivilege data on an affected device.
Affected Software
1 affected component
Zyxel Ex3501-t0<=5.44(ACHR.6)C0
Event History
Oct 20, 2026
CVE Published
via MITRE·02:04 AM
Data Sourced
via MITRE·02:04 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·03:17 AM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What level of access does an attacker need to exploit this issue?
The attacker must already be authenticated to the affected device. Exploitation consists of modifying the login_privilege data to escalate privileges.
2
Which firmware versions are affected?
Zyxel EX3501-T0 firmware versions through 5.44(ACHR.6)C0 are affected.
3
What is the potential impact after exploitation?
A successful attacker can gain elevated privileges on the affected device. The reported impact includes high confidentiality impact, with no stated integrity or availability impact.