{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-31173", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-04-23T18:54:51.167Z", "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": "2026-04-23T18:04:29.972Z"}, "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 interval 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-interval-cmd-injection"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-77", "lang": "en", "description": "CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')"}]}], "references": [{"url": "https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-interval-cmd-injection", "tags": ["exploit"]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-23T18:54:08.908499Z", "id": "CVE-2026-31173", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-23T18:54:51.167Z"}}]}, "dataVersion": "5.2"}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*", "matchCriteriaId": "DD39B647-3419-4C6D-A6A2-30F40822A27D", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:totolink:a3300r:-:*:*:*:*:*:*:*", "matchCriteriaId": "7F723A73-4B32-4F9E-B5DA-80134D4711C1", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "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 interval parameter to /cgi-bin/cstecgi.cgi."}], "id": "CVE-2026-31173", "lastModified": "2026-04-27T14:54:54.583", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-04-23T19:17:25.603", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-interval-cmd-injection"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-interval-cmd-injection"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.0.0cu.557_b20221024"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "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": "2026-04-28T07:49:16.435531+00:00", "value": {"mitigation_remediation": ["Upgrade the router firmware to a version that fixes the command injection in /cgi-bin/cstecgi.cgi.", "If a newer firmware release is not available, restrict external access to the web interface using firewall rules or VLAN segmentation so that only trusted administrators can reach it.", "Disable or block the /cgi-bin/cstecgi.cgi endpoint if the device configuration allows, or prevent omission of parameters such as interval via input validation or parameter whitelisting.", "Monitor web access logs for suspicious requests to cstecgi.cgi and investigate any anomalous activity."], "summary": {"action": "Apply Firmware", "impact": "Remote Command Execution"}, "threat_synthesis": {"affected_systems": "All Totolink A3300R routers running firmware version 17.0.0cu.557_B20221024 are affected. Users of other firmware releases or hardware variants are not listed as vulnerable.", "description_and_impact": "A command injection flaw was found in the Totolink A3300R router\u2019s web interface where an attacker can supply arbitrary commands in the interval parameter of the /cgi-bin/cstecgi.cgi endpoint. The flaw permits execution of any operating\u2011system command on the device, potentially giving an attacker full control over the router. The weakness is categorized as command injection (CWE-77).", "risk_and_exploitability": "The vulnerability carries a CVSS score of 6.5, indicating a moderate severity, and an EPSS score of less than 1%, suggesting low current exploitation probability. It is not listed in CISA\u2019s KEV catalog. Exploitation would likely involve crafting a malicious HTTP request to /cgi-bin/cstecgi.cgi with a manipulated interval value, sending it over the network to the exposed web interface. The description does not state whether authentication is required, so it is inferred that remote unauthenticated access could be sufficient, although that may depend on additional device settings."}}}}, "created": "2026-04-28T00:00:17.472213+00:00", "title": "Command Injection via Interval Parameter in Totolink A3300R Firmware", "updated": "2026-04-28T08:00:14.345767+00:00", "vendors": ["totolink", "totolink$PRODUCT$a3300r_firmware"]}