{"schemaVersion":3,"id":"CVE-2024-38270","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.","dates":{"published":"2024-09-10T01:20:09.147Z","modified":"2024-09-10T15:15:34.477Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00212,"percentile":0.10871,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00212},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00212,"percentile":0.10871}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00212,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00212,"percentile":0.10871}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-331","name":"Insufficient Entropy","description":"The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/331.html"}],"affected":[{"vendor":"zyxel","product":"gs1900-10hp_firmware","name":"gs1900-10hp firmware","label":"gs1900-10hp_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(aazi.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(aazi.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-10hp"},{"vendor":"zyxel","product":"gs1900-10hp firmware","name":"GS1900-10HP firmware","label":"gs1900-10hp firmware","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"V2.80(AAZI.0)C0","noFixRecorded":false,"fixedIn":null}],"versionsText":"V2.80(AAZI.0)C0","eol":null,"hubHref":"/vendor/zyxel/gs1900-10hp_firmware"},{"vendor":"zyxel","product":"gs1900-16_firmware","name":"gs1900-16 firmware","label":"gs1900-16_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(aahj.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(aahj.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-16"},{"vendor":"zyxel","product":"gs1900-24_firmware","name":"gs1900-24 firmware","label":"gs1900-24_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≤ 2.80\\(aahl.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2.80\\(aahl.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-24"},{"vendor":"zyxel","product":"gs1900-24e_firmware","name":"gs1900-24e firmware","label":"gs1900-24e_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≤ 2.80\\(aahk.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2.80\\(aahk.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-24e"},{"vendor":"zyxel","product":"gs1900-24ep_firmware","name":"gs1900-24ep firmware","label":"gs1900-24ep_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(abto.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(abto.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-24ep"},{"vendor":"zyxel","product":"gs1900-24hpv2_firmware","name":"gs1900-24hpv2 firmware","label":"gs1900-24hpv2_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(abtp.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(abtp.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-24hpv2"},{"vendor":"zyxel","product":"gs1900-48_firmware","name":"gs1900-48 firmware","label":"gs1900-48_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(aahn.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(aahn.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-48"},{"vendor":"zyxel","product":"gs1900-48hpv2_firmware","name":"gs1900-48hpv2 firmware","label":"gs1900-48hpv2_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(abtq.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(abtq.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-48hpv2"},{"vendor":"zyxel","product":"gs1900-8_firmware","name":"gs1900-8 firmware","label":"gs1900-8_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(aahh.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(aahh.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-8"},{"vendor":"zyxel","product":"gs1900-8hp_firmware","name":"gs1900-8hp firmware","label":"gs1900-8hp_firmware","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"< 2.80\\(aahi.1\\)c0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.80\\(aahi.1\\)c0","eol":null,"hubHref":"/vendor/zyxel/gs1900-8hp"}],"affectedCount":11,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-insufficient-entropy-vulnerability-for-web-authentication-tokens-generation-in-gs1900-series-switches-09-10-2024","label":"www.zyxel.com/global/…","hostname":"www.zyxel.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2024-09-10T01:20:09.147Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-10T15:15:34.477Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T05:54:53.410Z","stale":false,"partial":false}}