{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-26791", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-03-14T03:23:33.407Z", "dateReserved": "2026-02-16T00:00:00.000Z", "datePublished": "2026-03-12T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-03-12T18:01:15.727Z"}, "descriptions": [{"lang": "en", "value": "GL-iNet GL-AR300M16 v4.3.11 was discovered to contain a command injection vulnerability via the string port parameter in the enable_echo_server function. This vulnerability allows attackers to execute arbitrary commands via a crafted input."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/sezangel/IOT-vul/tree/main/GL-iNet/GL-AR300M16/enable_echo_server"}], "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')"}]}], "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": "2026-03-14T03:22:11.679660Z", "id": "CVE-2026-26791", "options": [{"Exploitation": "none"}, {"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": "2026-03-14T03:23:33.407Z"}}]}, "dataVersion": "5.2"}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:gl-inet:ar300m16_firmware:4.3.11:*:*:*:*:*:*:*", "matchCriteriaId": "FD9AA29E-C1C0-4F18-AB85-DA8285B74EE3", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:gl-inet:ar300m16:-:*:*:*:*:*:*:*", "matchCriteriaId": "FA3E349B-C40F-4DE6-B977-CF677B2F9814", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "GL-iNet GL-AR300M16 v4.3.11 was discovered to contain a command injection vulnerability via the string port parameter in the enable_echo_server function. This vulnerability allows attackers to execute arbitrary commands via a crafted input."}, {"lang": "es", "value": "GL-iNet GL-AR300M16 v4.3.11 se descubri\u00f3 que conten\u00eda una vulnerabilidad de inyecci\u00f3n de comandos a trav\u00e9s del par\u00e1metro de cadena 'port' en la funci\u00f3n enable_echo_server. Esta vulnerabilidad permite a los atacantes ejecutar comandos arbitrarios mediante una entrada manipulada."}], "id": "CVE-2026-26791", "lastModified": "2026-03-16T14:18:27.057", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-12T18:16:22.690", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/sezangel/IOT-vul/tree/main/GL-iNet/GL-AR300M16/enable_echo_server"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-77"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.3.11"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "gl-ar300m16", "vendor": "gl-inet"}], "analysis": {"en": {"generated_at": "2026-03-18T16:06:46.358624+00:00", "value": {"mitigation_remediation": ["Apply the latest GL\u2011iNet firmware that removes or secures the enable_echo_server functionality.", "If an update is unavailable, disable the enable_echo_server feature via the router\u2019s configuration settings or block its associated network port.", "Restrict access to the router\u2019s management interface to trusted IP addresses or networks only.", "Implement network segmentation to isolate the router from critical infrastructure and reduce the blast radius.", "Enable comprehensive logging and monitor for suspicious command usage or anomalous traffic patterns."], "summary": {"action": "Patch Now", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The affected hardware is the GL\u2011iNet GL\u2011AR300M16 router running firmware 4.3.11. No other firmware revisions or product variants are currently documented as impacted. The vulnerability is confined to the enable_echo_server routine and does not affect other services on the device.", "description_and_impact": "GL\u2011iNet GL\u2011AR300M16 firmware version 4.3.11 contains a command injection flaw in the enable_echo_server function. The vulnerability arises from unvalidated user input on the string port parameter, allowing an attacker to inject operating\u2011system escape sequences and construct arbitrary shell commands. The weakness is classified as CWE\u201177. This flaw provides full control over the device\u2019s operating system, enabling attackers to exfiltrate data, alter configuration, or pivot to other network assets.", "risk_and_exploitability": "The CVSS score of 9.8 classifies this issue as Critical. The EPSS score is reported as less than 1\u202f%, indicating a low probability of current exploitation. The vulnerability is not listed in the CISA KEV catalog. Based on the description, it is inferred that the attack vector requires remote access to the device\u2019s web or management interface, through which a crafted port value can be supplied to trigger the injection. This would allow an attacker with network reach to the router to run arbitrary commands, effectively compromising the host."}}}}, "created": "2026-03-13T09:53:50.482465+00:00", "title": "Command Injection Vulnerability in GL\u2011iNet GL\u2011AR300M16 v4.3.11", "updated": "2026-03-20T15:36:29.536188+00:00", "vendors": ["gl-inet", "gl-inet$PRODUCT$gl-ar300m16"]}