High severity · published Feb 24, 2026
CVE-2026-1459
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…
7.2
CVSS
1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VF
VMG3625-T50B firmware · Zyxel
<= 5.50(ABPM.9.7)C0 · source: vendor, NVD
DF
Dx5401-b1 Firmware · Zyxel
through 5.17\(abyo.7.1\)c0 · source: NVD
EF
Emg3525-t50b Firmware · Zyxel
through 5.50\(abpm.9.7\)c0 · source: NVD
EF
Emg5523-t50b Firmware · Zyxel
through 5.50\(abpm.9.7\)c0 · source: NVD
VF
Vmg3625-t50c Firmware · Zyxel
through 5.50\(abpm.9.7\)c0 · source: NVD
VF
Vmg8623-t50b Firmware · Zyxel
through 5.50\(abpm.9.7\)c0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1459
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1459
Vendor Advisory
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
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