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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "9.1.0u.6279_B20210910"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "NR1800X", "source": "cna", "vendor": "Totolink"}, "product": "nr1800x", "vendor": "totolink"}], "analysis": {"en": {"generated_at": "2026-03-29T05:50:27.997328+00:00", "value": {"mitigation_remediation": ["Acquire and apply the most recent firmware update from Totolink that addresses the command injection flaw.", "Fully disable the Telnet service or restrict its access to trusted IP addresses using firewall or ACL rules.", "Configure the network to block inbound traffic on port 23 or otherwise restrict access to the telnet interface if an update is unavailable.", "Enable logging for telnet connections and review logs for suspicious activity.", "Maintain a regular patch management process that includes checking for new Totolink firmware releases and applying them promptly."], "summary": {"action": "Patch Immediately", "impact": "Remote Command Execution via Command Injection"}, "threat_synthesis": {"affected_systems": "The only documented affected product is the Totolink NR1800X router running firmware version 9.1.0u.6279_B20210910. The vulnerability description does not mention other firmware releases or models.", "description_and_impact": "A flaw was identified in the Telnet Service of Totolink NR1800X firmware 9.1.0u.6279_B20210910 that allows an attacker to inject arbitrary commands through the host_time parameter of the NTPSyncWithHost function in cstecgi.cgi. The vulnerability is classified as CWE\u201174 and CWE\u201177, and the exploit can be triggered remotely using the telnet interface. Successful exploitation would enable the attacker to execute any commands with the privileges of the Telnet process, compromising the router and potentially the connected network.", "risk_and_exploitability": "The CVSS score of 5.3 indicates moderate severity. No EPSS score is available, and the issue is not listed in the CISA KEV catalog. However, the vulnerability is publicly disclosed and can be exploited remotely over the telnet port without mention of authentication. Attackers can achieve remote execution, which could lead to full compromise of the device and lateral movement within the network."}}}}, "created": "2026-03-29T20:31:47.668145+00:00", "updated": "2026-03-30T06:58:39.721370+00:00", "vendors": ["totolink", "totolink$PRODUCT$nr1800x"]}