CVE-2026-6559

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:o:wavlink:wl-wn579a3_firmware:*:*:*:*:*:*:*:*"], "product": "WL-WN579A3", "vendor": "Wavlink", "versions": [{"status": "affected", "version": "220323"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in Wavlink WL-WN579A3 220323. This affects the function sub_401F80 of the file /cgi-bin/login.cgi. This manipulation of the argument Hostname causes cross site scripting. Remote exploitation of the attack is possible. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product."}, {"lang": "es", "value": "Se ha identificado una vulnerabilidad en Wavlink WL-WN579A3 220323. Esto afecta a la funci\u00f3n sub_401F80 del archivo /cgi-bin/login.cgi. Esta manipulaci\u00f3n del argumento Hostname provoca cross-site scripting. La explotaci\u00f3n remota del ataque es posible. Se recomienda actualizar el componente afectado. Se contact\u00f3 al proveedor con antelaci\u00f3n, respondi\u00f3 de manera muy profesional y r\u00e1pidamente lanz\u00f3 una versi\u00f3n corregida del producto afectado."}], "id": "CVE-2026-6559", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "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": 5.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-6559", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-20T16:07:42.463712Z", "version": "2.0.3"}}]}, "published": "2026-04-19T06:16:10.437", "references": [{"source": "cna@vuldb.com", "url": "https://dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin"}, {"source": "cna@vuldb.com", "url": "https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_16/README.md"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/785303"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/358196"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/358196/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-94"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "220323"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "WL-WN579A3", "source": "cna", "vendor": "Wavlink"}, "product": "wl-wn579a3", "vendor": "wavlink"}], "analysis": {"en": {"generated_at": "2026-04-19T06:20:47.082119+00:00", "value": {"mitigation_remediation": ["Upgrade the device firmware to the fixed version released by Wavlink", "Restrict administrative interface access to trusted networks or enforce firewall rules that limit exposure", "Validate and sanitize the Hostname input parameter to prevent reflected cross site scripting"], "summary": {"action": "Patch Now", "impact": "Cross Site Scripting"}, "threat_synthesis": {"affected_systems": "The issue affects the Wavlink WL\u2011WN579A3 router running firmware version 220323. All devices that have not applied the vendor\u2019s patch are exposed.", "description_and_impact": "The vulnerability lies in the sub_401F80 function of /cgi-bin/login.cgi in Wavlink WL-WN579A3 firmware 220323. An attacker can manipulate the Hostname argument, causing the script to be executed in the victim\u2019s browser. This enables malicious code execution within the context of the web interface, potentially leading to data theft or session hijacking. The weakness is an unchecked input that is reflected in the response, classifying it under CWE\u201179 and the associated code evaluation abuse listed as CWE\u201194.", "risk_and_exploitability": "The CVSS score of 5.3 points to moderate impact; EPSS is unavailable, and the vulnerability is not listed in the CISA KEV catalog. Because the flaw is exploitable remotely via the HTTP interface, an attacker only needs to send a crafted request to the login.cgi endpoint. The exploit does not require elevated privileges on the device, making it broadly available to anyone able to reach the router\u2019s web interface."}}}}, "created": "2026-04-19T06:30:05.387396+00:00", "updated": "2026-04-19T06:30:05.584032+00:00", "vendors": ["wavlink", "wavlink$PRODUCT$wl-wn579a3"]}