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CVE-2026-12489

Quick assessment

Affected
Zyxel EX3501-T0 firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 ZyXel EX3501-T0 固件版本 5.44(ACHR.6)C0 及更早版本的数据访问层（DAL）中存在一个授权错误漏洞。该漏洞可能允许已认证的攻击者通过修改受影响设备上的登录权限（login_privilege）数据来提升自身权限。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-12489

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel EX3501-T0 firmware <= 5.44(ACHR.6)C0 -

II. Public POCs for CVE-2026-12489

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III. Intelligence Information for CVE-2026-12489

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Other References for CVE-2026-12489 (1)

IV. Related Vulnerabilities

Same vendor: Zyxel
Same weakness: CWE-863

V. Comments for CVE-2026-12489

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