CVE-2021-25811

Description

MERCUSYS Mercury X18G 1.0.5 devices allow Denial of service via a crafted value to the POST listen_http_lan parameter. Upon subsequent device restarts after this vulnerability is exploted the device will not be able to access the webserver unless the listen_http_lan parameter to uhttpd.json is manually fixed.

7.5

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.51%

Vendor Advisory com.cn Vendor Advisory mercusys.com

Affected: n/a n/a

References

Link	Tags
https://www.mercusys.com/en/	vendor advisory
https://www.mercurycom.com.cn/product-521-1.html	product vendor advisory
https://github.com/pokerfacett/MY_REQUEST/blob/master/Mercury%20Router%20X18g%20v1.0.5%20Denial%20of%20Service.md	broken link

Frequently Asked Questions

What is the severity of CVE-2021-25811?: CVE-2021-25811 has been scored as a high severity vulnerability.
How to fix CVE-2021-25811?: To fix CVE-2021-25811, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-25811 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-25811 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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