{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-11409: OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-11409","status":"final","version":"1","initial_release_date":"2026-06-16T21:03:47.128Z","current_release_date":"2026-06-16T21:03:47.128Z","revision_history":[{"date":"2026-06-16T21:03:47.128Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"An authenticated OS command injection vulnerability exists in the IPv6 PPPoE configuration handler in TL-WR940N v6 due to improper sanitization of user input. An attacker with administrative access may exploit this issue to execute arbitrary system commands with elevated privileges.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-11409 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-11409"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-11409"},{"category":"external","summary":"tp-link.com","url":"https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware"},{"category":"external","summary":"tp-link.com","url":"https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware"},{"category":"external","summary":"tp-link.com","url":"https://www.tp-link.com/us/support/faq/5131/"}]},"product_tree":{"branches":[{"category":"vendor","name":"TP-Link Systems Inc.","branches":[{"category":"product_name","name":"TL-WR940N v6","branches":[{"category":"product_version_range","name":"<V6_260528","product":{"name":"TP-Link Systems Inc. TL-WR940N v6 <V6_260528","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:tp-link_systems_inc.:tl-wr940n_v6:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-11409","title":"OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N","notes":[{"category":"description","text":"An authenticated OS command injection vulnerability exists in the IPv6 PPPoE configuration handler in TL-WR940N v6 due to improper sanitization of user input. An attacker with administrative access may exploit this issue to execute arbitrary system commands with elevated privileges.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","baseScore":8.5,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: V6_260528.","product_ids":["CSAFPID-1"],"url":"https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware"}]}]}