{"id":"CVE-2022-43393","aliases":["EUVD-2022-46432","GHSA-36hf-3x3x-vfch"],"status":"published","title":"An improper check for unusual or exceptional conditions in the HTTP request processing function...","description":"An improper check for unusual or exceptional conditions in the HTTP request processing function of Zyxel GS1920-24v2 firmware prior to V4.70(ABMH.8)C0, which could allow an unauthenticated attacker to corrupt the contents of the memory and result in a denial-of-service (DoS) condition on a vulnerable device.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00582,"percentile":0.48151,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-754"],"published":"2023-01-11T00:00:00Z","modified":"2026-06-17T05:06:25Z","products":[{"vendor":"zyxel","product":"gs1350-12hp_firmware"},{"vendor":"zyxel","product":"gs1350-18hp_firmware"},{"vendor":"zyxel","product":"gs1350-26hp_firmware"},{"vendor":"zyxel","product":"gs1350-6hp_firmware"},{"vendor":"zyxel","product":"gs1915-24e_firmware"},{"vendor":"zyxel","product":"gs1915-24ep_firmware"},{"vendor":"zyxel","product":"gs1915-8_firmware"},{"vendor":"zyxel","product":"gs1915-8ep_firmware"},{"vendor":"zyxel","product":"gs1920-24hpv2_firmware"},{"vendor":"zyxel","product":"gs1920-24v2 firmware"},{"vendor":"zyxel","product":"gs1920-24v2_firmware"},{"vendor":"zyxel","product":"gs1920-48hpv2_firmware"},{"vendor":"zyxel","product":"gs1920-48v2_firmware"},{"vendor":"zyxel","product":"gs2220-10_firmware"},{"vendor":"zyxel","product":"gs2220-10hp_firmware"},{"vendor":"zyxel","product":"gs2220-28_firmware"},{"vendor":"zyxel","product":"gs2220-28hp_firmware"},{"vendor":"zyxel","product":"gs2220-50_firmware"},{"vendor":"zyxel","product":"gs2220-50hp_firmware"},{"vendor":"zyxel","product":"mgs3500-24s_firmware"},{"vendor":"zyxel","product":"mgs3520-28_firmware"},{"vendor":"zyxel","product":"mgs3520-28f_firmware"},{"vendor":"zyxel","product":"mgs3530-28_firmware"},{"vendor":"zyxel","product":"xgs1930-28_firmware"},{"vendor":"zyxel","product":"xgs1930-28hp_firmware"},{"vendor":"zyxel","product":"xgs1930-52_firmware"},{"vendor":"zyxel","product":"xgs1930-52hp_firmware"},{"vendor":"zyxel","product":"xgs2210-28_firmware"},{"vendor":"zyxel","product":"xgs2210-28hp_firmware"},{"vendor":"zyxel","product":"xgs2210-52_firmware"},{"vendor":"zyxel","product":"xgs2210-52hp_firmware"},{"vendor":"zyxel","product":"xgs2220-30_firmware"},{"vendor":"zyxel","product":"xgs2220-30f_firmware"},{"vendor":"zyxel","product":"xgs2220-30hp_firmware"},{"vendor":"zyxel","product":"xgs2220-54_firmware"},{"vendor":"zyxel","product":"xgs2220-54fp_firmware"},{"vendor":"zyxel","product":"xgs2220-54hp_firmware"},{"vendor":"zyxel","product":"xgs4600-32_firmware"},{"vendor":"zyxel","product":"xgs4600-32f_firmware"},{"vendor":"zyxel","product":"xgs4600-52f_firmware"},{"vendor":"zyxel","product":"xmg1930-30_firmware"},{"vendor":"zyxel","product":"xmg1930-30hp_firmware"},{"vendor":"zyxel","product":"xs1930-10_firmware"},{"vendor":"zyxel","product":"xs1930-12f_firmware"},{"vendor":"zyxel","product":"xs1930-12hp_firmware"},{"vendor":"zyxel","product":"xs3800-28_firmware"}],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-dos-vulnerability-of-switches","tags":["x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-43393"},{"url":"https://github.com/advisories/GHSA-36hf-3x3x-vfch"}],"sources":{"cve":[{"id":"CVE-2022-43393","description":"An improper check for unusual or exceptional conditions in the HTTP request processing function of Zyxel GS1920-24v2 firmware prior to V4.70(ABMH.8)C0, which could allow an unauthenticated attacker to corrupt the contents of the memory and result in a denial-of-service (DoS) condition on a vulnerable device.","status":"published","published":"2023-01-11T00:00:00Z","modified":"2025-04-08T14:29:52.874Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:34:25.308772Z"}],"euvd":[{"id":"EUVD-2022-46432","description":"An improper check for unusual or exceptional conditions in the HTTP request processing function of Zyxel GS1920-24v2 firmware prior to V4.70(ABMH.8)C0, which could allow an unauthenticated attacker to corrupt the contents of the memory and result in a denial-of-service (DoS) condition on a vulnerable device.","status":"published","published":"2023-01-11T00:00:00Z","modified":"2025-04-08T14:29:52Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:40.053562Z"}],"ghsa":[{"id":"GHSA-36hf-3x3x-vfch","title":"An improper check for unusual or exceptional conditions in the HTTP request processing function...","description":"An improper check for unusual or exceptional conditions in the HTTP request processing function of Zyxel GS1920-24v2 firmware prior to V4.70(ABMH.8)C0, which could allow an unauthenticated attacker to corrupt the contents of the memory and result in a denial-of-service (DoS) condition on a vulnerable device.","status":"published","published":"2023-01-11T03:30:19Z","modified":"2023-02-03T05:04:13Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:53:30.880998Z"}],"nvd":[{"id":"CVE-2022-43393","description":"An improper check for unusual or exceptional conditions in the HTTP request processing function of Zyxel GS1920-24v2 firmware prior to V4.70(ABMH.8)C0, which could allow an unauthenticated attacker to corrupt the contents of the memory and result in a denial-of-service (DoS) condition on a vulnerable device.","status":"published","published":"2023-01-11T02:15:11.403Z","modified":"2026-06-17T05:06:25.66Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:07:35.157734Z"}]}}