CVE-2020-5756
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to...
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
- Record
CVE-2020-5756- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.0 High
AV:N/AC:L/Au:S/C:C/I:C/A:C - Weakness
- CWE-489, CWE-78
- Updated
- 2026-11-02
CVE List No score
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
- Record
CVE-2020-5756- Weakness
- CWE-489
- Updated
- 2026-11-02
EUVDEUVD-2020-26915 No score
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
- Record
EUVD-2020-26915- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hcrv-c4wc-hj94 No score
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to...
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
- Record
GHSA-hcrv-c4wc-hj94- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-5756 is a high vulnerability (CVSS 8.8) in Grandstream Gwn7000 Firmware, published July 17, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.47%, the 84th percentile. No source names a fixed version.