CVE-2021-27257

Description

This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information 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 downloading of files via FTP. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-12362.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.04%
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-21-264/ vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-27257?
CVE-2021-27257 has been scored as a medium severity vulnerability.
How to fix CVE-2021-27257?
To fix CVE-2021-27257, 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-2021-27257 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-27257 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-2021-27257?
CVE-2021-27257 affects NETGEAR R7800.
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