CVE-2021-39290: Netmodule Router Software

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Certain NetModule devices allow Limited Session Fixation via PHPSESSID. These models with firmware before 4.3.0.113, 4.4.0.111, and 4.5.0.105 are affected: NB800, NB1600, NB1601, NB1800, NB1810, NB2700, NB2710, NB2800, NB2810, NB3700, NB3701, NB3710, NB3711, NB3720, and NB3800.

Affected products

• Netmodule Netmodule Router Software: before 4.3.0.113 (fixed in 4.3.0.113); from 4.4.0.0, before 4.4.0.111 (fixed in 4.4.0.111); from 4.5.0.0, before 4.5.0.105 (fixed in 4.5.0.105)

Published 2021-08-23. Last modified 2026-06-17.