CVE-2021-41506
Xiongmai
- Published
- 30 June 2022
- Last modified
- 17 June 2026
- CVSS
- 9.8 v3.1
- Severity
- critical
- EPSS
- 2.3% (82th pct)
- CISA KEV
- Not listed
- NVD status
- Modified
- Weaknesses
- CWE-287
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Exploitation
Not listed in the CISA Known Exploited Vulnerabilities catalogue as of 2026.09.04. That is an absence of confirmed public exploitation, not evidence that exploitation has not occurred. EPSS models a 2.3% probability of exploitation activity in the next 30 days.
Affected products
| Product | Vendor | Type | Versions named |
|---|---|---|---|
| AHB7008T-MH-V2 | Xiongmai | unknown | 4.02.r11.7601, 4.02.r11.7601.nat.onvif.20170420, 4.02.r11.7601.nat.onvifc.20170420 |
| AHB7804R-ELS | Xiongmai | unknown | 4.02.r11.nat.onvif.20160422, 4.02.r11.nat.onvifc.20160422 |
| AHB7804R-LMS | Xiongmai | unknown | 4.02.r11.nat.20170301, 4.02.r11.nat.onvifc.20170301 |
| AHB7804R-MH-V2 | Xiongmai | unknown | 4.02.r11.7601.nat.onvif.20170424, 4.02.r11.7601.nat.onvifc.20170424 |
| AHB7808R-MS | Xiongmai | unknown | 4.02.r11.nat.onvif.20160328, 4.02.r11.nat.onvifc.20170328 |
| AHB7808R-MS-V2 | Xiongmai | unknown | 4.02.r11.nat.onvif.20170327, 4.02.r11.nat.onvifc.20170327 |
| AHB7808T-MS-V2 | Xiongmai | unknown | 4.02.r11.nat.onvifc.20161205 |
| HI3518E 50H10L S39 | Xiongmai | unknown | 4.02.r12.nat.onvifs.20170727, 4.02.r12.nat.onvifs.20170727_all |
References
Vendor advisory and patch
- https://www.xiongmaitech.com/en/index.php/news/info/12/68
- https://www.xiongmaitech.com/en/index.php/news/info/12/68
- https://github.com/Snawoot/hisilicon-dvr-telnet third-party
- https://github.com/tothi/hs-dvr-telnet third-party
- https://habr.com/en/post/486856/ exploit
- https://github.com/Snawoot/hisilicon-dvr-telnet third-party
- https://github.com/tothi/hs-dvr-telnet third-party
- https://habr.com/en/post/486856/ exploit
Record assembled from NVD, CISA KEV 2026.09.04 and FIRST EPSS 2026-09-04. Affected products are those NVD's CPE configuration names that fall inside this site's scope; a CVE may affect products outside it.