CVE-2026-2191

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The exploit has been made available to the public and could be used for attacks."}, {"lang": "es", "value": "Se ha identificado una debilidad en Tenda AC9 15.03.06.42_multi. La funci\u00f3n formGetDdosDefenceList est\u00e1 afectada. Esta manipulaci\u00f3n del argumento security.ddos.map causa desbordamiento de b\u00fafer basado en pila. El ataque puede iniciarse remotamente. El exploit se ha puesto a disposici\u00f3n del p\u00fablico y podr\u00eda usarse para ataques."}], "id": "CVE-2026-2191", "lastModified": "2026-06-17T10:30:30.600", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "MULTIPLE", "availabilityImpact": "COMPLETE", "baseScore": 8.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:M/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 6.4, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2191", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-09T20:59:03.732671Z", "version": "2.0.3"}}]}, "published": "2026-02-08T23:15:49.483", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/glkfc/IoT-Vulnerability/blob/main/Tenda/tenda3.md"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.344894"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.344894"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.749800"}, {"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://www.tenda.com.cn/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T13:09:11.158148+00:00", "value": {"mitigation_remediation": ["Upgrade the AC9 to a firmware version that resolves the formGetDdosDefenceList flaw", "Disable or restrict remote access to the router\u2019s management interface so that only trusted hosts can invoke the vulnerable API", "Apply network\u2011level controls, such as firewall rules or VLAN segmentation, to isolate or block traffic to the vulnerable endpoint and monitor for malicious activity"], "summary": {"action": "Patch Now", "impact": "Remote stack-based buffer overflow that can lead to code execution or denial of service"}, "threat_synthesis": {"affected_systems": "Tenda manufactures the AC9 consumer router, and the specific firmware revision 15.03.06.42_multi is affected. Devices operating this firmware are susceptible to the overflow; no other Tenda models or firmware versions were listed as vulnerable in the available data.", "description_and_impact": "A flaw in the formGetDdosDefenceList function of Tenda AC9 firmware 15.03.06.42_multi allows an attacker to manipulate the security.ddos.map argument so that the target device\u2019s stack buffer overflows. The vulnerability is a classic stack-based overflow identified by CWE-119 and CWE-121 and could corrupt control flow on the router. It can thus compromise router integrity, allow remote code execution, or crash the device, resulting in loss of availability for all local network traffic.", "risk_and_exploitability": "The CVSS score of 8.6 indicates a high severity. Although the EPSS score is below 1%, the vulnerability is already in the public domain and documented exploits exist, so the likelihood of real-world use is non\u2011negligible. The remote attack vector implies that an external actor can send crafted traffic to the router to trigger the overflow, which could result in remote code execution or a denial\u2011of\u2011service if exploited."}}}}, "created": "2026-02-09T10:39:44.438316+00:00", "updated": "2026-04-18T13:15:25.715948+00:00", "vendors": ["tenda", "tenda$PRODUCT$ac9"]}