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No exploitation reportedFix available

CVE-2021-39291

No exploitation reported by the sources we read.

  • Published2021-08-23
  • Fixed in4.5.0.105 · 4.4.0.111 · 4.3.0.113
  • WeaknessCWE-532

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Certain 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 affected: NB800, NB1600, NB1601, NB1800, NB1810, NB2700, NB2710, NB2800, NB2810, NB3700, NB3701, NB3710, NB3711, NB3720, and NB3800.

Timeline

dates in UTC
  1. 2021-08-2305:15CVE publishedNVD

Versions per branch

NVD
Netmodule netmodule router softwareversion to verify
BranchAffectedFixed in
4.5≥ 4.5.0.0, < 4.5.0.1054.5.0.105
4.4≥ 4.4.0.0, < 4.4.0.1114.4.0.111
4.3< 4.3.0.1134.3.0.113

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Netmodule netmodule router software to 4.5.0.105 · 4.4.0.111 · 4.3.0.113

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-08-23
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-46vv-mmqm-cfv8

Frequently asked questions

What is CVE-2021-39291?

Certain 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 affected: NB800, NB1600, NB1601, NB1800, NB1810, NB2700, NB2710, NB2800, NB2810, NB3700, NB3701, NB3710, NB3711, NB3720, and NB3800.

Is CVE-2021-39291 actively exploited?

Active exploitation of CVE-2021-39291 has not been confirmed. Its EPSS score was 1.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-39291?

CVE-2021-39291 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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