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Juniper Warns of Mystery Backdoor In NetScreen Products

ID: 46554b96-e6df-5ca6-b39d-4a0d654ddd78

STIX ID: report--46554b96-e6df-5ca6-b39d-4a0d654ddd78

Feed Name: Security Ledger

Threat Score
85/100

Date Published: 2015-12-18

Date Updated: 2026-05-05

Author: Paul Roberts

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The report describes Juniper's discovery of unauthorized backdoor code in ScreenOS affecting NetScreen devices that could permit remote administrative access via SSH/Telnet and enable decryption of VPN traffic; Juniper issued emergency patches for affected versions (dating back to 2012), warned that evidence of compromise may be difficult to detect, and is investigating possible nation-state involvement though no exploitation reports have been confirmed.

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