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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.0.0cu.557_b20221024"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "a3300r_firmware", "vendor": "totolink"}], "analysis": {"en": {"generated_at": "2026-04-28T07:49:00.427307+00:00", "value": {"mitigation_remediation": ["Upgrade the device to the latest available firmware that contains the fix for the stunMinAlive command injection flaw.", "Apply network segmentation or firewall rules to restrict access to the web administration interface and the /cgi-bin/cstecgi.cgi endpoint from untrusted networks.", "Disable or block the STUN service on the router, if supported, to eliminate the vulnerable interface from exposure."], "summary": {"action": "Immediate Patch", "impact": "Remote Command Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Totolink routers running A3300R firmware version 17.0.0cu.557_B20221024. The affected CPEs indicate a hardware device and its associated firmware, so any units deployed with that build are susceptible.", "description_and_impact": "An issue in Totolink A3300R firmware allows attackers to execute arbitrary commands via the stunMinAlive parameter exposed in /cgi-bin/cstecgi.cgi. This flaw represents a command injection vulnerability (CWE\u201178) that can lead to full control over the affected device, compromising confidentiality, integrity, and availability of the network it serves.", "risk_and_exploitability": "The CVSS score of 9.8 marks it a critical vulnerability, while an EPSS score of less than 1% suggests a low probability of exploitation at the present time. The flaw is not listed in the CISA KEV catalog. The likely attack vector is network-based, requiring an attacker to send a specially crafted HTTP request to the device\u2019s web interface; no authentication prerequisites are reported, so the attack could be performed against any device exposed to the network."}}}}, "created": "2026-04-28T00:00:17.471929+00:00", "title": "Command Injection via stunMinAlive Parameter in Totolink A3300R Firmware", "updated": "2026-04-28T08:00:14.338868+00:00", "vendors": ["totolink", "totolink$PRODUCT$a3300r_firmware"]}