CVE-2020-5756
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.47% probability · 84th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-489, CWE-78
- Affected
- grandstream/gwn7000 firmware
- Source
- vulnreport@tenable.com
EPSS 2.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.tenable.com/security/research/tra-2020-41Not Applicable
- https://www.tenable.com/cve/CVE-2020-5756Exploit, Third Party Advisory
- https://www.tenable.com/security/research/tra-2020-41Not Applicable
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.