Auth bypass in Netcomm Nf20
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.110 (95.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.110 · newest: 0.110 · change: 0.000
Affected products
- Netcomm Nf20 — versions R6B025
- Netcomm Nf20mesh — versions R6B025
- Netcomm Nl1902 — versions R6B025
- Netcommwireless Nf20
- Netcommwireless Nf20 Firmware
- Netcommwireless Nf20mesh
- Netcommwireless Nf20mesh Firmware
- Netcommwireless Nl1902
- Netcommwireless Nl1902 Firmware
Weakness classification (CWE)
References
- github.com/scarvell/advisories/blob/main/2022_netcomm_nf20mesh_unauth_rce.md (Exploit, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-4874?
- CVE-2022-4874 is a high-severity vulnerability in Netcomm Nf20, classified under Improper Authentication. CVSS score: 7.5/10. Published 2023-01-11.
- How severe is CVE-2022-4874?
- High severity. CVSS v3 base score is 7.5 out of 10.