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Vulnerability record · CVE-2021-39290 · published 23 August 2021

CVE-2021-39290: Netmodule router software vulnerability

Netmodule · Netmodule Router Software

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.

9.8 CVSS 3.1 Critical EPSS 1.5% · top 26.3% CWE-384 · CWE-384
9.8CVSS 3.1 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://seclists.org/fulldisclosure/2021/Aug/22 ExploitMailing ListThird Party Advisory
https://www.netmodule.com Vendor Advisory
https://seclists.org/fulldisclosure/2021/Aug/22 ExploitMailing ListThird Party Advisory
https://www.netmodule.com Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-0862Netmodule router software path traversal vulnerabilityThe NetModule NSRW web administration interface is vulnerable to path traversals, which could lead to arbitrary file uploads and deletion. By uploadi…EPSS 2.4%8.8CVE-2023-0861Netmodule router software command injection vulnerabilityNetModule NSRW web administration interface executes an OS command constructed with unsanitized user input. A successful exploit could allow an authe…EPSS 29%8.8CVE-2021-39291Netmodule router software sensitive information in log file vulnerabilityCertain NetModule devices allow credentials via GET parameters to CLI-PHP. These models with firmware before 4.3.0.113, 4.4.0.111, and 4.5.0.105 are …EPSS 1.5%7.5CVE-2021-39289Netmodule router software insufficiently protected credentials vulnerabilityCertain NetModule devices have Insecure Password Handling (cleartext or reversible encryption), These models with firmware before 4.3.0.113, 4.4.0.11…EPSS 1.1%6.6CVE-2023-46306Netmodule router software os command injection vulnerabilityThe web administration interface in NetModule Router Software (NRSW) 4.6 before 4.6.0.106 and 4.8 before 4.8.0.101 executes an OS command constructed…EPSS 0.96%

Source: NIST National Vulnerability Database (record CVE-2021-39290), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.