{"cve":"CVE-2021-41506","nvd":{"published":"2022-06-30T13:15:08.350","modified":"2026-06-17T04:08:35.023","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://github.com/Snawoot/hisilicon-dvr-telnet","https://github.com/tothi/hs-dvr-telnet","https://habr.com/en/post/486856/","https://www.xiongmaitech.com/en/index.php/news/info/12/68","https://github.com/Snawoot/hisilicon-dvr-telnet"],"products":["xiongmaitech:ahb7008t-mh-v2_firmware","xiongmaitech:ahb7804r-els_firmware","xiongmaitech:ahb7804r-lms_firmware","xiongmaitech:ahb7804r-mh-v2_firmware","xiongmaitech:ahb7808r-ms-v2_firmware","xiongmaitech:ahb7808r-ms_firmware","xiongmaitech:ahb7808t-ms-v2_firmware","xiongmaitech:hi3518e_50h10l_s39_firmware"],"source":"nvd","synced_at":"2026-10-19T21:32:39.174919249+00:00"},"epss":{"cve":"CVE-2021-41506","score":0.02328,"percentile":0.83523,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}