CVE-2021-27705

Public Exploit

Description

Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.58% Top 20%
Third-Party Advisory hackmd.io
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://hackmd.io/Zb7lfFaNR0ScpaTssECFbg third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-27705?
CVE-2021-27705 has been scored as a critical severity vulnerability.
How to fix CVE-2021-27705?
To fix CVE-2021-27705, 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-2021-27705 being actively exploited in the wild?
It is possible that CVE-2021-27705 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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