Improper authentication in Netcomm NF20
Priority HIGH 72CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.11009 95th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Netcomm | NF20 | R6B025 | — | No fix listed | CNA |
| Netcomm | NF20MESH | R6B025 | — | No fix listed | CNA |
| Netcomm | NL1902 | R6B025 | — | No fix listed | CNA |
- NF20 VendorNetcomm Affected R6B025 Fixed in — No fix listed CNA
- NF20MESH VendorNetcomm Affected R6B025 Fixed in — No fix listed CNA
- NL1902 VendorNetcomm Affected R6B025 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:netcommwireless:nf20_firmware:*:*:*:*:*:*:*:* | before r6b025 | Vulnerable | NetComm Wireless Pty Ltd |
| cpe:2.3:h:netcommwireless:nf20:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetComm Wireless Pty Ltd |
| cpe:2.3:o:netcommwireless:nf20mesh_firmware:*:*:*:*:*:*:*:* | before r6b025 | Vulnerable | NetComm Wireless Pty Ltd |
| cpe:2.3:h:netcommwireless:nf20mesh:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetComm Wireless Pty Ltd |
| cpe:2.3:o:netcommwireless:nl1902_firmware:*:*:*:*:*:*:*:* | before r6b025 | Vulnerable | NetComm Wireless Pty Ltd |
| cpe:2.3:h:netcommwireless:nl1902:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetComm Wireless Pty Ltd |
- cpe:2.3:o:netcommwireless:nf20_firmware:*:*:*:*:*:*:*:* Versions before r6b025 Vulnerable ·NetComm Wireless Pty Ltd
- cpe:2.3:h:netcommwireless:nf20:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetComm Wireless Pty Ltd
- cpe:2.3:o:netcommwireless:nf20mesh_firmware:*:*:*:*:*:*:*:* Versions before r6b025 Vulnerable ·NetComm Wireless Pty Ltd
- cpe:2.3:h:netcommwireless:nf20mesh:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetComm Wireless Pty Ltd
- cpe:2.3:o:netcommwireless:nl1902_firmware:*:*:*:*:*:*:*:* Versions before r6b025 Vulnerable ·NetComm Wireless Pty Ltd
- cpe:2.3:h:netcommwireless:nl1902:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetComm Wireless Pty Ltd
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-4874
- 2026-10-03 Alias added: GHSA-6pwv-hr7p-g77v
References
More Netcomm vulnerabilities
- TI-2022-04466 Stack based overflow on Netcomm router models NF20MESH, NF20, and NL1902 CVSS 3.1CRITICAL 9.8
- TI-2017-08620 NetComm Wireless 4GT101W routers with Hardware: 0.01 / Software: V1.1.8.8 / Bootloader… CVSS 3.0CRITICAL 9.8
- TI-2025-03553 Arbitrary Command Injection in Netcom NTC-6200 & NWL-222 CVSS 4.0HIGH 8.6
- TI-2017-08621 NetComm Wireless 4GT101W routers with Hardware: 0.01 / Software: V1.1.8.8 / Bootloader… CVSS 3.0HIGH 8.8
- TI-2005-00838 Netcomm 1300NB DSL Modem allows remote attackers to cause a denial of service (device… CVSS 2.0MEDIUM 5.0
- TI-2017-03828 Cross-site scripting (XSS) vulnerability in the NetComm NB16WV-02 router with firmware… CVSS 3.0MEDIUM 5.4
Sources
- CVE-2022-4874 · CVE Program
- CVE-2022-4874 · NVD
- FIRST EPSS
- GHSA-6pwv-hr7p-g77v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences