{"id":"CVE-2021-33536","aliases":["EUVD-2021-20228","GHSA-32vx-68rr-3qv3"],"status":"published","title":"WEIDMUELLER: WLAN devices affected by Denial-of-Service vulnerability","description":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service vulnerability exists in ServiceAgent functionality. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or out-of-bounds memory. An attacker can send this packet while unauthenticated to trigger this vulnerability.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01037,"percentile":0.64353,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-191"],"published":"2021-06-25T18:26:01Z","modified":"2026-06-17T03:54:44Z","products":[{"vendor":"weidmueller","product":"ie-wl-bl-ap-cl-eu_firmware"},{"vendor":"weidmueller","product":"ie-wl-bl-ap-cl-us_firmware"},{"vendor":"weidmueller","product":"ie-wl-vl-ap-br-cl-eu_firmware"},{"vendor":"weidmueller","product":"ie-wl-vl-ap-br-cl-us_firmware"},{"vendor":"weidmueller","product":"ie-wlt-bl-ap-cl-eu_firmware"},{"vendor":"weidmueller","product":"ie-wlt-bl-ap-cl-us_firmware"},{"vendor":"weidmueller","product":"ie-wlt-vl-ap-br-cl-eu_firmware"},{"vendor":"weidmueller","product":"ie-wlt-vl-ap-br-cl-us_firmware"},{"vendor":"weidmüller","product":"ie-wl(t)-bl-ap-cl-xx"},{"vendor":"weidmüller","product":"ie-wl(t)-vl-ap-cl-xx"}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-026","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33536"},{"url":"https://github.com/advisories/GHSA-32vx-68rr-3qv3"}],"sources":{"cve":[{"id":"CVE-2021-33536","title":"WEIDMUELLER: WLAN devices affected by Denial-of-Service vulnerability","description":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service vulnerability exists in ServiceAgent functionality. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or out-of-bounds memory. An attacker can send this packet while unauthenticated to trigger this vulnerability.","status":"published","published":"2021-06-25T18:26:01.011Z","modified":"2024-09-17T03:38:31.151Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20228","description":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service vulnerability exists in ServiceAgent functionality. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or out-of-bounds memory. An attacker can send this packet while unauthenticated to trigger this vulnerability.","status":"published","published":"2021-06-25T18:26:01Z","modified":"2024-09-17T03:38:31Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:28:29.877686Z"}],"ghsa":[{"id":"GHSA-32vx-68rr-3qv3","title":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service...","description":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service vulnerability exists in ServiceAgent functionality. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or out-of-bounds memory. An attacker can send this packet while unauthenticated to trigger this vulnerability.","status":"published","published":"2022-05-24T19:06:16Z","modified":"2023-01-30T05:00:30Z","cwes":["CWE-191"],"updated_at":"2026-11-02T14:46:13.0899Z"}],"nvd":[{"id":"CVE-2021-33536","description":"In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service vulnerability exists in ServiceAgent functionality. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or out-of-bounds memory. An attacker can send this packet while unauthenticated to trigger this vulnerability.","status":"published","published":"2021-06-25T19:15:09.43Z","modified":"2026-06-17T03:54:44.627Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:06:54.892562Z"}]}}