{"id":"CVE-2021-41506","aliases":["EUVD-2021-28525","GHSA-6q5r-54qp-4cp9"],"status":"published","title":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS...","description":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS-V2, AHB7804R-LMS, HI3518_50H10L_S39 V4.02.R11.7601.Nat.Onvif.20170420, V4.02.R11.Nat.Onvif.20160422, V4.02.R11.7601.Nat.Onvif.20170424, V4.02.R11.Nat.Onvif.20170327, V4.02.R11.Nat.Onvif.20161205, V4.02.R11.Nat.20170301, V4.02.R12.Nat.OnvifS.20170727 is affected by a backdoor in the macGuarder and dvrHelper binaries of DVR/NVR/IP camera firmware due to static root account credentials in the system.","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":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.02328,"percentile":0.83659,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287","CWE-522"],"published":"2022-06-30T12:43:54Z","modified":"2026-06-17T04:08:35Z","products":[{"vendor":"xiongmaitech","product":"ahb7008t-mh-v2_firmware"},{"vendor":"xiongmaitech","product":"ahb7804r-els_firmware"},{"vendor":"xiongmaitech","product":"ahb7804r-lms_firmware"},{"vendor":"xiongmaitech","product":"ahb7804r-mh-v2_firmware"},{"vendor":"xiongmaitech","product":"ahb7808r-ms-v2_firmware"},{"vendor":"xiongmaitech","product":"ahb7808r-ms_firmware"},{"vendor":"xiongmaitech","product":"ahb7808t-ms-v2_firmware"},{"vendor":"xiongmaitech","product":"hi3518e_50h10l_s39_firmware"}],"references":[{"url":"https://habr.com/en/post/486856/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.xiongmaitech.com/en/index.php/news/info/12/68","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://github.com/Snawoot/hisilicon-dvr-telnet","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://github.com/tothi/hs-dvr-telnet","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41506"},{"url":"https://github.com/advisories/GHSA-6q5r-54qp-4cp9"}],"sources":{"cve":[{"id":"CVE-2021-41506","description":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS-V2, AHB7804R-LMS, HI3518_50H10L_S39 V4.02.R11.7601.Nat.Onvif.20170420, V4.02.R11.Nat.Onvif.20160422, V4.02.R11.7601.Nat.Onvif.20170424, V4.02.R11.Nat.Onvif.20170327, V4.02.R11.Nat.Onvif.20161205, V4.02.R11.Nat.20170301, V4.02.R12.Nat.OnvifS.20170727 is affected by a backdoor in the macGuarder and dvrHelper binaries of DVR/NVR/IP camera firmware due to static root account credentials in the system.","status":"published","published":"2022-06-30T12:43:54Z","modified":"2024-08-04T03:15:28.367Z","updated_at":"2026-11-02T14:32:59.105382Z"}],"euvd":[{"id":"EUVD-2021-28525","description":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS-V2, AHB7804R-LMS, HI3518_50H10L_S39 V4.02.R11.7601.Nat.Onvif.20170420, V4.02.R11.Nat.Onvif.20160422, V4.02.R11.7601.Nat.Onvif.20170424, V4.02.R11.Nat.Onvif.20170327, V4.02.R11.Nat.Onvif.20161205, V4.02.R11.Nat.20170301, V4.02.R12.Nat.OnvifS.20170727 is affected by a backdoor in the macGuarder and dvrHelper binaries of DVR/NVR/IP camera firmware due to static root account credentials in the system.","status":"published","published":"2022-06-30T12:43:54Z","modified":"2024-08-04T03:15:28Z","updated_at":"2026-11-03T03:24:17.663217Z"}],"ghsa":[{"id":"GHSA-6q5r-54qp-4cp9","title":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS...","description":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS-V2, AHB7804R-LMS, HI3518_50H10L_S39 V4.02.R11.7601.Nat.Onvif.20170420, V4.02.R11.Nat.Onvif.20160422, V4.02.R11.7601.Nat.Onvif.20170424, V4.02.R11.Nat.Onvif.20170327, V4.02.R11.Nat.Onvif.20161205, V4.02.R11.Nat.20170301, V4.02.R12.Nat.OnvifS.20170727 is affected by a backdoor in the macGuarder and dvrHelper binaries of DVR/NVR/IP camera firmware due to static root account credentials in the system.","status":"published","published":"2022-07-01T00:01:12Z","modified":"2023-01-27T05:05:09Z","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"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:42:38.42731Z"}],"nvd":[{"id":"CVE-2021-41506","description":"Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS-V2, AHB7804R-LMS, HI3518_50H10L_S39 V4.02.R11.7601.Nat.Onvif.20170420, V4.02.R11.Nat.Onvif.20160422, V4.02.R11.7601.Nat.Onvif.20170424, V4.02.R11.Nat.Onvif.20170327, V4.02.R11.Nat.Onvif.20161205, V4.02.R11.Nat.20170301, V4.02.R12.Nat.OnvifS.20170727 is affected by a backdoor in the macGuarder and dvrHelper binaries of DVR/NVR/IP camera firmware due to static root account credentials in the system.","status":"published","published":"2022-06-30T13:15:08.35Z","modified":"2026-06-17T04:08:35.023Z","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":"primary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:07:06.501652Z"}]}}