CVE-2021-27252

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the vendor_specific DHCP opcode. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12216.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.41%
Vendor Advisory netgear.com
Affected: NETGEAR R7800
Published at:
Updated at:

References

Link Tags
https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders patch vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-248/ third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2021-27252?
CVE-2021-27252 has been scored as a high severity vulnerability.
How to fix CVE-2021-27252?
To fix CVE-2021-27252, 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-2021-27252 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-27252 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27252?
CVE-2021-27252 affects NETGEAR R7800.
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