CVE-2022-4874Public exploitNetwork attack vector

Authentication bypass via substring-matched static paths

Published Jan 11, 2023 · Updated Nov 4, 2025

Authentication bypass in NetComm NF20, NF20MESH, and NL1902 before R6B035 allows remote attackers to read restricted web content. The httpd server uses strstr() to find static-file tokens such as .css anywhere in a URL and gives matching requests an active session. A request with a Referer header and a restricted path prefixed by /.css/ passes the check; this flaw alone exposes content but does not execute code.

CVSS severity7.5
High
EPSS probability11.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in NetComm NF20, NF20MESH, and NL1902 before R6B035 allows remote attackers to read restricted web content. The httpd server uses strstr() to find static-file tokens such as .css anywhere in a URL and gives matching requests an active session. A request with a Referer header and a restricted path prefixed by /.css/ passes the check; this flaw alone exposes content but does not execute code.

The record

CVE
CVE-2022-4874
Published
Jan 11, 2023
Updated
Nov 4, 2025
Vendor
NetComm Wireless Pty Ltd
Product
NF20MESH
Classifications
CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=R6B025

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NetComm Wireless Pty Ltd · NF20MESHversion=R6B025
NetComm Wireless Pty Ltd · NL1902version=R6B025
NetComm Wireless Pty Ltd · NF20version=R6B025

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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