What is CVE-2021-39291?

CVE-2021-39291 is a high-severity vulnerability in Netmodule Nb1600, classified under Insertion of Sensitive Information into Log File. CVSS score: 8.8/10. Published 2021-08-23.

How severe is CVE-2021-39291?

High severity. CVSS v3 base score is 8.8 out of 10.

Information disclosure in Netmodule Nb1600

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.

Published 2021-08-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

www.netmodule.com (Vendor Advisory)
seclists.org/fulldisclosure/2021/Aug/22 (Exploit, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-39291?: CVE-2021-39291 is a high-severity vulnerability in Netmodule Nb1600, classified under Insertion of Sensitive Information into Log File. CVSS score: 8.8/10. Published 2021-08-23.
How severe is CVE-2021-39291?: High severity. CVSS v3 base score is 8.8 out of 10.