CVE-2015-6016

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-12-31 · updated 2026-06-17
Weakness: CWE-255

Description

ZyXEL P-660HW-T1 2 devices with ZyNOS firmware 3.40(AXH.0), PMG5318-B20A devices with firmware 1.00AANC0b5, and NBG-418N devices have a default password of 1234 for the admin account, which allows remote attackers to obtain administrative access via unspecified vectors.

Affected products

Zyxel Nbg-418N: all versions
Zyxel Pmg5318-B20A Firmware: v100aanc0b5
Zyxel Zynos Firmware: 3.40(axh.0)

References

http://www.securitytracker.com/id/1034552
http://www.securitytracker.com/id/1034553
http://www.securitytracker.com/id/1034554
https://www.kb.cert.org/vuls/id/870744
https://www.kb.cert.org/vuls/id/BLUU-9ZQU2R
http://www.securitytracker.com/id/1034552
http://www.securitytracker.com/id/1034553
http://www.securitytracker.com/id/1034554
https://www.kb.cert.org/vuls/id/870744
https://www.kb.cert.org/vuls/id/BLUU-9ZQU2R

Get alerted when CVE-2015-6016 or the next vulnerability affects your stack