{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2025-52221", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-04-10T15:42:37.221Z", "dateReserved": "2025-06-16T00:00:00.000Z", "datePublished": "2026-04-08T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-04-08T17:11:13.066Z"}, "descriptions": [{"lang": "en", "value": "Tenda AC6 15.03.05.16_multi is vulnerable to Buffer Overflow in the formSetCfm function via the funcname, funcpara1, and funcpara2 parameters."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/faqiadegege/IoTVuln/blob/main/tendaAc6_formSetCfm_funcname_overflow/detail.md"}, {"url": "https://github.com/xiaotea/iot-vulnerability-collection/blob/main/README.md"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-120", "lang": "en", "description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-04-10T13:08:39.678948Z", "id": "CVE-2025-52221", "options": [{"Exploitation": "none"}, {"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": "2026-04-10T15:42:37.221Z"}}]}, "dataVersion": "5.2"}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "15.03.05.16_multi"}}], "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": "ac6", "vendor": "tenda"}], "analysis": {"en": {"generated_at": "2026-04-13T16:35:25.102967+00:00", "value": {"mitigation_remediation": ["Update the Tenda AC6 firmware to a version that addresses the formSetCfm buffer overflow.", "If no update is available, restrict access to the router\u2019s management interface by firewall rules or by placing the device behind an isolated network segment.", "Monitor device logs for anomalous use of the formSetCfm parameters or repeated failure attempts.", "Contact Tenda support for further guidance if the device cannot be updated or isolated."], "summary": {"action": "Patch Update", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Tenda AC6 routers that are running firmware version 15.03.05.16_multi. These consumer Wi\u2011Fi access points are typically managed through a web or other remote interface.", "description_and_impact": "A stack-based buffer overflow exists in the formSetCfm function of Tenda AC6 firmware 15.03.05.16_multi, triggered by overflowing the funcname, funcpara1, and funcpara2 parameters. The overflow can corrupt memory and potentially allow an attacker to execute arbitrary code, crash the device, or tamper with its configuration. This weakness is identified as CWE-120 (Buffer Overflow) and CWE-787 (Out-of-Bounds Write).", "risk_and_exploitability": "The CVSS v3.1 score of 7.5 indicates high severity, while the EPSS score of less than 1% suggests a low current probability of exploitation. This issue is not listed in the CISA KEV catalog. Based on the description, the likely attack vector is remote access to the router\u2019s web or management interface, possibly from the local network or an external source if the interface is exposed. No active exploitation code has been publicly reported, but the theoretical impact warrants prompt action."}}}}, "created": "2026-04-08T19:44:40.529382+00:00", "title": "Tenda AC6 Buffer Overflow via formSetCfm Function", "updated": "2026-04-14T16:40:45.268990+00:00", "vendors": ["tenda", "tenda$PRODUCT$ac6"]}