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CVE-2026-1459

HIGH
7.2
CVSS Score
Published: February 24, 2026 at 02:48 AM UTC
Updated: June 17, 2026 at 10:15 AM UTC
7 products affected across 1 vendorEmg5523-t50b FirmwareEmg3525-t50b FirmwareVmg8623-t50b Firmware

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Severity
HIGH7.2
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

A post-authentication command injection vulnerability in the TR-369 certificate download CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9.7)C0 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on an affected device.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Dx5401-b1 Firmware· Zyxel
95%
v ≤ 5.17(abyo.7.1)c0
zyxel-dx5401-b1 (same device)
Emg3525-t50b Firmware· Zyxel
95%
v ≤ 5.50(abpm.9.7)c0
zyxel-emg3525-t50b (same device)
Emg5523-t50b Firmware· Zyxel
95%
v ≤ 5.50(abpm.9.7)c0
zyxel-emg5523-t50b (same device)
Vmg3625-t50b Firmware· Zyxel
95%
v ≤ 5.50(abpm.9.7)c0
zyxel-vmg3625-t50b (same device)
Vmg3625-t50c Firmware· Zyxel
95%
v ≤ 5.50(abpm.9.7)c0
zyxel-vmg3625-t50c (same device)
Vmg8623-t50b Firmware· Zyxel
95%
v ≤ 5.50(abpm.9.7)c0
zyxel-vmg8623-t50b (same device)
Vmg3625-t50b· Zyxel
60%
v ≤ 5.50

References (1)

Vendor Advisory
Source: cverecord
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGHZyxel
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-78

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