CVE-2026-12489: An incorrect authorization vulnerability in the Data Access Layer (DAL) of Zyxel EX3501-T0 firmware versions through 5.4

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.

Affected Products

Vendor	Product	Versions
zyxel	ex3501-t0 firmware	<= 5.44(ACHR.6)C0

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-incorrect-authorization-vulnerability-in-the-dal-of-certain-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-and-wireless-extenders-10-20-2026(vendor-advisory)

Related News (1 articles)

Tier C

VulDB2d ago

CVE-2026-12489 | Zyxel EX3501-T0 up to 5.44(ACHR.6)C0 Data Access Layer improper authorization

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CVSS 3.16.5 MEDIUM

VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA KEV❌ No

Actively exploited❌ No

Patch available

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-incorrect-authorization-vulnerability-in-the-dal-of-certain-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-and-wireless-extenders-10-20-2026

CWECWE-863

PublishedOct 20, 2026

Trending Score18

Source articles1

Independent1

Info Completeness0/14

CVE-2026-12489: An incorrect authorization vulnerability in the Data Access Layer (DAL) of Zyxel EX3501-T0 firmware versions through 5.4

Description

Affected Products

References

Related News (1 articles)

Discussion (0)

Community Vote

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