CVE-2026-35019
HighCVSS 8.1Summary
NetComm NF20MESH routers running firmware R6B031 and earlier contain an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by exploiting a hardcoded AES-256 key used to encrypt session cookies for the web management interface. Attackers can forge a valid encrypted session cookie using the shared hardcoded key and bypass authentication checks.
Risk Assessment
This vulnerability poses a serious security risk, allowing attackers to gain full control over the management interface, which could lead to unauthorized changes in router configuration and potential attacks on the local network.
Recommendation
It is recommended to update the router firmware to a version newer than R6B031 to mitigate this vulnerability. Additionally, consider changing default security settings and monitoring activity in the management interface.
Original NVD description (English source)
NetComm NF20MESH routers running firmware R6B031 and earlier contain an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by exploiting a hardcoded AES-256 key used to encrypt session cookies for the web management interface. Attackers can forge a valid encrypted session cookie using the shared hardcoded key and bypass authentication checks to obtain full administrative control of the management interface while any legitimate administrator session is active.