CVE-2026-41036: Command injection in Quantum Networks routers

CVE-2026-41036 is a command injection vulnerability identified in Quantum Networks routers. The flaw exists in the management CLI interface, where user-supplied input is not adequately sanitized. An authenticated attacker can exploit it to inject and execute arbitrary OS commands with root privileges on the networking device, potentially compromising the entire routing infrastructure and critical perimeter functions.

CVSS score is 8.8, classified as high. The vulnerability was published to NVD on 2026-04-21. On 2026-10-28, a public research signal appeared on GitHub with a case study on the vulnerability in model QN-I-470: a recent signal indicating active technical interest in the security research community, although available data do not confirm active exploitation or widespread public exploit distribution.

First step: contact Quantum Networks to verify availability of official patches or technical advisories. Audit your inventory to identify presence of Quantum Networks routers model QN-I-470 or equivalent in production environments. Immediate defensive measures: restrict management CLI access to authorized users and systems only, enforce complex and non-shared credentials, enable comprehensive audit logging of all CLI access, and actively monitor for anomalous commands. Segregate management traffic on dedicated VLANs with strict access control policies.