{"id":"CVE-2021-31624","title":"Buffer Overflow vulnerability in Tenda AC9 V1.0 through V15.03.05.19(6318), and AC9 V3.0 V15.03.06.42_multi, allows attackers to execute arbitrary code via the urls parameter.","summary":"Buffer Overflow vulnerability in Tenda AC9 V1.0 through V15.03.05.19(6318), and AC9 V3.0 V15.03.06.42_multi, allows attackers to execute arbitrary code via the urls parameter.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-120"],"vendor":"tendacn","product":"ac9_firmware","affected":["ac9_firmware <= 15.03.06.42_multi","ac9_firmware <= 15.03.05.19\\(6318\\)"],"published":"2021-10-29","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-31624","references":[{"url":"https://github.com/Lyc-heng/routers/blob/main/routers/stack2.md","label":"cve@mitre.org"},{"url":"http://tenda.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/Lyc-heng/routers/blob/main/routers/stack2.md","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01144,"epssPercentile":0.65332,"ingestedAt":"2026-07-06T17:03:23.597Z","slug":"CVE-2021-31624","body":"## Overview\n\nBuffer Overflow vulnerability in Tenda AC9 V1.0 through V15.03.05.19(6318), and AC9 V3.0 V15.03.06.42_multi, allows attackers to execute arbitrary code via the urls parameter.\n\n## Affected\n\n- `ac9_firmware <= 15.03.06.42_multi`\n- `ac9_firmware <= 15.03.05.19\\(6318\\)`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}