CVE-2026-12489

Incorrect Authorization in Zyxel EX3501‑T0 Firmware Enables Privilege Escalation

Published Oct 20, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
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 login_privilege data on an affected device.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Incorrect Authorization in Zyxel EX3501‑T0 Firmware Enables Privilege Escalation
Type Values Removed Values Added
First Time appeared Zyxel
Zyxel ex3501-t0 Firmware
Vendors & Products Zyxel
Zyxel ex3501-t0 Firmware
Type Values Removed Values Added
Description 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 login_privilege data on an affected device.
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Zyxel
Published
Updated
Nov 4, 2026, 12:17 AM
Reserved
Jun 17, 2026, 3:45 AM
Status
Deferred
Published
Oct 20, 2026, 3:17 AM
Modified
Nov 3, 2026, 11:17 PM