CVE-2026-1155

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The attack may be performed from remote. The exploit has been made public and could be used."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad en Totolink LR350 9.3.5u.6369_B20220309. Afectada por esta vulnerabilidad es la funci\u00f3n setWiFiEasyGuestCfg del archivo /cgi-bin/cstecgi.cgi. La manipulaci\u00f3n del argumento ssid resulta en desbordamiento de b\u00fafer. El ataque puede realizarse desde remoto. El exploit se ha hecho p\u00fablico y podr\u00eda utilizarse."}], "id": "CVE-2026-1155", "lastModified": "2026-06-17T10:15:13.740", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 9.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "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": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "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": 7.4, "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": "LOW", "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:L/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-2026-1155", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-01-20T21:31:11.837825Z", "version": "2.0.3"}}]}, "published": "2026-01-19T13:16:20.360", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://lavender-bicycle-a5a.notion.site/TOTOLINK-LR350-setWiFiEasyGuestCfg-2e453a41781f8034bae3d1a11066a8fb?source=copy_link"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.341749"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.341749"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.735718"}, {"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://www.totolink.net/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-120"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T20:14:26.045046+00:00", "value": {"mitigation_remediation": ["Update the router to the latest Totolink firmware that addresses the setWiFiEasyGuestCfg buffer overflow.", "If a patch is not yet available, block remote access to the admin interface and prevent external use of the /cgi-bin/cstecgi.cgi endpoint by disabling or restricting the URL at the web server or firewall level.", "Deploy firewall rules to rate\u2011limit or filter traffic destined for the /cgi-bin/cstecgi.cgi path and monitor device logs for abnormal ssid parameter activity."], "summary": {"action": "Apply Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Totolink LR350 routers operating with firmware 9.3.5u.6369_B20220309. No other vendors or product variants are listed in the available data.", "description_and_impact": "The flaw lies in the setWiFiEasyGuestCfg routine of /cgi-bin/cstecgi.cgi, where user-supplied ssid data is copied into a fixed\u2011size buffer without proper bounds checking. This stack\u2011based overflow can be triggered by a specially crafted ssid value sent from a remote host, and the publicly available exploit demonstrates that an attacker can potentially execute arbitrary code or crash the device, leading to loss of confidentiality, integrity or availability.", "risk_and_exploitability": "With a CVSS score of 8.7 the flaw is high severity, and the EPSS score of less than 1% suggests that exploitation is not yet widespread. The vulnerability is not currently catalogued in the CISA KEV list, but the public exploit code indicates that a remote attacker can target the /cgi-bin/cstecgi.cgi endpoint to trigger the overflow and potentially gain remote code execution on the device."}}}}, "created": "2026-01-20T08:43:37.005954+00:00", "updated": "2026-04-18T20:15:09.552535+00:00", "vendors": ["totolink", "totolink$PRODUCT$lr350"]}