What’s Vulnerable › Vulnerabilities

CVE-2022-4873: Stack based overflow on Netcomm router models NF20MESH, NF20, and NL1902

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-01-11 · updated 2026-06-17
• Weakness: CWE-787

Description

On Netcomm router models NF20MESH, NF20, and NL1902 a stack based buffer overflow affects the sessionKey parameter. By providing a specific number of bytes, the instruction pointer is able to be overwritten on the stack and crashes the application at a known location.

Affected products

• Netcommwireless Nf20 Firmware: before r6b025 — fixed in r6b025
• Netcommwireless Nf20Mesh Firmware: before r6b025 — fixed in r6b025
• Netcommwireless Nl1902 Firmware: before r6b025 — fixed in r6b025

How to fix

Upgrade to a fixed version: Netcommwireless Nf20 Firmware r6b025; Netcommwireless Nf20Mesh Firmware r6b025; Netcommwireless Nl1902 Firmware r6b025. Check the vendor advisory for mitigations.

References

• https://github.com/scarvell/advisories/blob/main/2022_netcomm_nf20mesh_unauth_rce.md
• https://github.com/scarvell/advisories/blob/main/2022_netcomm_nf20mesh_unauth_rce.md
• https://www.kb.cert.org/vuls/id/986018

Get alerted when CVE-2022-4873 or the next vulnerability affects your stack