CVE-2020-5756
HIGHCVSS 8.8/10EPSS 2.47%
Last modified
CVE-2020-5756 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 2.47% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Grandstream | Gwn7000 Firmware | <= 1.0.9.4 |
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
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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. An attacker can use this functionality to execute arbitrary OS commands on the router.
How severe is CVE-2020-5756?
CVE-2020-5756 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.47% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5756?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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Are you affected by CVE-2020-5756?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST