{"id":"CVE-2021-1956","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-1956","generatedAt":"2026-10-27T22:31:49.410Z","title":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT,…","description":"Improper handling of ASB-U packet with L2CAP channel ID by slave host can lead to interference with piconet in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Voice & Music","published":"2021-09-09T08:15:23.000Z","lastModified":"2026-06-17T03:33:01.000Z","status":"Modified","sourceIdentifier":"product-security@qualcomm.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["qualcomm/aqt1000 firmware","qualcomm/ar8035 firmware","qualcomm/csrb31024 firmware","qualcomm/qca6175a firmware","qualcomm/qca6390 firmware","qualcomm/qca6391 firmware","qualcomm/qca6420 firmware","qualcomm/qca6430 firmware","qualcomm/qca6564a firmware","qualcomm/qca6564au firmware","qualcomm/qca6574 firmware","qualcomm/qca6574a firmware","qualcomm/qca6574au firmware","qualcomm/qca6584au firmware","qualcomm/qca6595 firmware","qualcomm/qca6595au firmware","qualcomm/qca6696 firmware","qualcomm/qca8337 firmware","qualcomm/qcn7605 firmware","qualcomm/qcn7606 firmware","qualcomm/qcx315 firmware","qualcomm/sa415m firmware","qualcomm/sa515m firmware","qualcomm/sa6145p firmware","qualcomm/sa6150p firmware","qualcomm/sa6155 firmware","qualcomm/sa6155p firmware","qualcomm/sa8145p firmware","qualcomm/sa8150p firmware","qualcomm/sa8155 firmware","qualcomm/sa8155p firmware","qualcomm/sa8195p firmware","qualcomm/sc8180x\\+sdx55 firmware","qualcomm/sd 8c firmware","qualcomm/sd 8cx firmware","qualcomm/sdx55 firmware","qualcomm/wcd9340 firmware","qualcomm/wcd9341 firmware","qualcomm/wcd9360 firmware","qualcomm/wcn3998 firmware","qualcomm/wsa8810 firmware","qualcomm/wsa8815 firmware"],"epss":{"score":0.00233,"percentile":0.14046,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://www.qualcomm.com/company/product-security/bulletins/september-2021-bulletin","tags":["Vendor Advisory"],"source":"product-security@qualcomm.com"},{"url":"https://www.qualcomm.com/company/product-security/bulletins/september-2021-bulletin","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-1956","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}