{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-11523: Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-11523","status":"final","version":"1","initial_release_date":"2026-06-08T14:45:09.883Z","current_release_date":"2026-06-08T16:36:03.017Z","revision_history":[{"date":"2026-06-08T14:45:09.883Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"A flaw has been found in Tenda W20E 15.11.0.6. This issue affects the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. Executing a manipulation of the argument gotoUrl can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-11523 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-11523"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-11523"},{"category":"external","summary":"VDB-369143 | Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow","url":"https://vuldb.com/vuln/369143"},{"category":"external","summary":"VDB-369143 | CTI Indicators (IOB, IOC, IOA)","url":"https://vuldb.com/vuln/369143/cti"},{"category":"external","summary":"CVE-2026-11523 | CVE Analysis and Report","url":"https://vuldb.com/cve/CVE-2026-11523"},{"category":"external","summary":"Submit #836471 | Tenda W20E Enterprise Router V15.11.0.6 Stack-based Buffer Overflow","url":"https://vuldb.com/submit/836471"},{"category":"external","summary":"github.com","url":"https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formPortalAuth/formPortalAuth.md"},{"category":"external","summary":"tenda.com.cn","url":"https://www.tenda.com.cn/"}]},"product_tree":{"branches":[{"category":"vendor","name":"Tenda","branches":[{"category":"product_name","name":"W20E","branches":[{"category":"product_version","name":"15.11.0.6","product":{"name":"Tenda W20E 15.11.0.6","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:tenda:w20e:15.11.0.6:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-11523","title":"Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow","notes":[{"category":"description","text":"A flaw has been found in Tenda W20E 15.11.0.6. This issue affects the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. Executing a manipulation of the argument gotoUrl can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","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","baseScore":8.7,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}