{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-31178", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-04-23T18:45:52.991Z", "dateReserved": "2026-03-09T00:00:00.000Z", "datePublished": "2026-04-23T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-04-23T17:19:37.327Z"}, "descriptions": [{"lang": "en", "value": "An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stunMaxAlive parameter to /cgi-bin/cstecgi.cgi."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-max-alive-cmd-injection"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-78", "lang": "en", "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}], "references": [{"url": "https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-max-alive-cmd-injection", "tags": ["exploit"]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-23T18:44:45.350955Z", "id": "CVE-2026-31178", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-23T18:45:52.991Z"}}]}, "dataVersion": "5.2"}

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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": "2026-04-28T07:48:36.460080+00:00", "value": {"mitigation_remediation": ["Update the router firmware to the latest version provided by Totolink that addresses the command injection flaw.", "If a firmware update is not immediately available, restrict external access to the /cgi-bin/cstecgi.cgi endpoint using firewall rules, allowing only trusted internal networks.", "Continuously monitor web traffic logs for anomalous requests to stunMaxAlive or other CGI scripts and investigate any suspicious activity promptly."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The flaw affects the Totolink A3300R device running firmware 17.0.0cu.557_B20221024. No other vendors or product versions are listed as impacted.", "description_and_impact": "An input validation flaw in the stunMaxAlive parameter of the Totolink A3300R firmware version 17.0.0cu.557_B20221024 allows an attacker to inject and execute arbitrary commands via the /cgi-bin/cstecgi.cgi endpoint. The vulnerability is a classic CWE\u201178 command injection weakness that can compromise the host\u2019s confidentiality, integrity, and availability by enabling full remote code execution. The impact is limited to systems where the vulnerable firmware is in use and the CGI endpoint is accessible from an attacker\u2019s network.", "risk_and_exploitability": "The CVSS score of 9.8 indicates critical severity, while the EPSS score of less than 1% suggests a low current exploitation probability. The vulnerability is not listed in the CISA KEV catalog. Attackers would need network access to the device\u2019s web interface and the ability to craft a request to the cstecgi.cgi script. Once the request reaches the device, the injected command is executed with system privileges, enabling full control over the affected router."}}}}, "created": "2026-04-28T04:45:22.295372+00:00", "updated": "2026-04-28T08:00:14.322513+00:00", "vendors": ["totolink", "totolink$PRODUCT$a3300r_firmware"]}