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Public proof of conceptFix available

CVE-2022-4874

A public proof of concept exists; no exploitation attested.

  • Published2023-01-11
  • Fixed inr6b025
  • WeaknessCWE-287

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

Authentication bypass in Netcomm router models NF20MESH, NF20, and NL1902 allows an unauthenticated user to access content. In order to serve static content, the application performs a check for the existence of specific characters in the URL (.css, .png etc). If it exists, it performs a "fake login" to give the request an active session to load the file and not redirect to the login page.

Timeline

dates in UTC
  1. 2023-01-1121:15CVE publishedNVD

Versions per branch

NVD
Netcommwireless nf20 firmwareversion to verify
BranchAffectedFixed in
—< r6b025r6b025
Netcommwireless nf20mesh firmwareversion to verify
BranchAffectedFixed in
—< r6b025r6b025
Netcommwireless nl1902 firmwareversion to verify
BranchAffectedFixed in
—< r6b025r6b025

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

Products declared by the CNA3 products

As certcc, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Netcomm NF20
    Affected
    • = R6B025no fix stated
  • Netcomm NF20MESH
    Affected
    • = R6B025no fix stated
  • Netcomm NL1902
    Affected
    • = R6B025no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-01-11

Fix

  1. Update Netcommwireless nf20 firmware to r6b025

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:N/UI:N/S:U/C:H/I:N/A:N
Published
2023-01-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6pwv-hr7p-g77v

Frequently asked questions

What is CVE-2022-4874?

Authentication bypass in Netcomm router models NF20MESH, NF20, and NL1902 allows an unauthenticated user to access content. In order to serve static content, the application performs a check for the existence of specific characters in the URL (.css, .png etc). If it exists, it performs a "fake login" to give the request an active session to load the file and not redirect to the login page.

Is CVE-2022-4874 actively exploited?

A proof-of-concept exploit exists for CVE-2022-4874, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2022-4874?

CVE-2022-4874 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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