{"id":"CVE-2022-34747","aliases":["EUVD-2022-37696","GHSA-p6gf-558m-r8q3"],"status":"published","title":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could...","description":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01781,"percentile":0.78417,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-134"],"published":"2022-09-06T01:20:10Z","modified":"2026-06-17T04:50:51Z","products":[{"vendor":"zyxel","product":"nas326_firmware"},{"vendor":"zyxel","product":"zyxel nas326 firmware"}],"references":[{"url":"https://www.zyxel.com/support/Zyxel-security-advisory-for-format-string-vulnerability-in-NAS.shtml","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-34747"},{"url":"https://github.com/advisories/GHSA-p6gf-558m-r8q3"}],"sources":{"cve":[{"id":"CVE-2022-34747","description":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.","status":"published","published":"2022-09-06T01:20:10Z","modified":"2024-08-03T09:22:09.239Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:34:42.354707Z"}],"euvd":[{"id":"EUVD-2022-37696","description":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.","status":"published","published":"2022-09-06T01:20:10Z","modified":"2024-08-03T09:22:09Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T03:25:28.472981Z"}],"ghsa":[{"id":"GHSA-p6gf-558m-r8q3","title":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could...","description":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.","status":"published","published":"2022-09-07T00:01:56Z","modified":"2023-01-29T05:06:52Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:46:06.857512Z"}],"nvd":[{"id":"CVE-2022-34747","description":"A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.","status":"published","published":"2022-09-06T02:15:07.517Z","modified":"2026-06-17T04:50:51.437Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-134"],"updated_at":"2026-11-02T14:07:26.802986Z"}]}}