{"id":"CVE-2021-33822","aliases":["EUVD-2021-20497","GHSA-x6fg-pgp3-2g2v"],"status":"published","title":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use...","description":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01934,"percentile":0.80225,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2021-06-18T18:47:47Z","modified":"2026-06-17T03:55:16Z","products":[{"vendor":"sing4g","product":"4gee_router_hh70vb_firmware"}],"references":[{"url":"https://github.com/shekyan/slowhttptest","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.sing4g.com/product-page/4gee-router-hh70vb-4g-300mbps-2lan-32wifi","tags":["x_refsource_MISC","x_transferred","Product","Vendor Advisory"]},{"url":"https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33822.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33822"},{"url":"https://github.com/advisories/GHSA-x6fg-pgp3-2g2v"}],"sources":{"cve":[{"id":"CVE-2021-33822","description":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.","status":"published","published":"2021-06-18T18:47:47Z","modified":"2024-08-03T23:58:23.111Z","updated_at":"2026-11-02T14:33:10.204494Z"}],"euvd":[{"id":"EUVD-2021-20497","description":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.","status":"published","published":"2021-06-18T18:47:47Z","modified":"2024-08-03T23:58:23Z","updated_at":"2026-11-03T03:24:33.318275Z"}],"ghsa":[{"id":"GHSA-x6fg-pgp3-2g2v","title":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use...","description":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.","status":"published","published":"2022-05-24T19:05:39Z","modified":"2023-01-29T05:07:02Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:46:08.233339Z"}],"nvd":[{"id":"CVE-2021-33822","description":"An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.","status":"published","published":"2021-06-18T19:15:07.57Z","modified":"2026-06-17T03:55:16.343Z","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":"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-400"],"updated_at":"2026-11-02T14:06:54.892562Z"}]}}