{"id":"CVE-2021-20844","aliases":["EUVD-2021-8254","GHSA-gpv9-mf3p-h34x"],"status":"published","title":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI...","description":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.","severity":{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00957,"percentile":0.61725,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-116"],"published":"2021-11-24T08:25:45Z","modified":"2026-06-17T03:34:31Z","products":[{"vendor":"ntt-west","product":"biz_box_nvr510_firmware"},{"vendor":"ntt-west","product":"biz_box_nvr700w_firmware"},{"vendor":"ntt-west","product":"biz_box_rtx1210_firmware"},{"vendor":"ntt-west","product":"biz_box_rtx830_firmware"},{"vendor":"yamaha","product":"nvr510_firmware"},{"vendor":"yamaha","product":"nvr700w_firmware"},{"vendor":"yamaha","product":"rtx1210_firmware"},{"vendor":"yamaha","product":"rtx830_firmware"},{"vendor":"yamaha corporation","product":"rtx830, nvr510, nvr700w, rtx1210"}],"references":[{"url":"https://www.ntt-west.co.jp/smb/kiki_info/info/211109.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://business.ntt-east.co.jp/topics/2021/11_09.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"http://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVNVU91161784.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Vendor Advisory"]},{"url":"https://jvn.jp/en/vu/JVNVU91161784/index.html","tags":["x_refsource_MISC","x_transferred","Mitigation","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20844"},{"url":"https://github.com/advisories/GHSA-gpv9-mf3p-h34x"}],"sources":{"cve":[{"id":"CVE-2021-20844","description":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.","status":"published","published":"2021-11-24T08:25:45Z","modified":"2024-08-03T17:53:22.863Z","updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2021-8254","description":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.","status":"published","published":"2021-11-24T08:25:45Z","modified":"2024-08-03T17:53:22Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-gpv9-mf3p-h34x","title":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI...","description":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.","status":"published","published":"2021-11-25T00:00:38Z","modified":"2023-02-01T05:06:24Z","cwes":["CWE-116"],"updated_at":"2026-11-02T14:50:21.264393Z"}],"nvd":[{"id":"CVE-2021-20844","description":"Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.","status":"published","published":"2021-11-24T16:15:13.28Z","modified":"2026-06-17T03:34:31.84Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-116"],"updated_at":"2026-11-02T14:07:01.428028Z"}]}}