CVE-2022-4874 in the critical feed json
Authenticated bypass in Netcomm router models NF20MESH, NF20, and NL1902 allows unauthenticated user to get access to content.
published 2023-01-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52134
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 11.0%
- EPSS 11.0% chance of exploitation in 30 days, percentile 95%
- public exploits
- 0
- none known
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.
Patch / fix
- netcommwireless nf20_firmware r6b025
- netcommwireless nf20mesh_firmware r6b025
- netcommwireless nl1902_firmware r6b025
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 19 mo ago
Exploit prediction
11.01% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/scarvell/advisories/blob/main/2022_netcomm_nf20mesh_unauth_rce.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Netcomm NF20
- Netcomm NF20MESH
- Netcomm NL1902
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/scarvell/advisories/blob/main/2022_netcomm_nf20mesh_unauth_rce.md
exploit, third-party-advisory
- kb.cert.org /vuls/id/986018
Sources
- CVE List CVE-2022-4874
- NVD CVE-2022-4874
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.