CVE-2021-27255

Description

This vulnerability allows remote 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 refresh_status.aspx endpoint. The issue results from a lack of authentication required to start a service on the server. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12360.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.23% Top 25%
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-21-263/ third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2021-27255?
CVE-2021-27255 has been scored as a high severity vulnerability.
How to fix CVE-2021-27255?
To fix CVE-2021-27255, 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-2021-27255 being actively exploited in the wild?
It is possible that CVE-2021-27255 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27255?
CVE-2021-27255 affects NETGEAR R7800.
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