Medium severity6.5NVD Advisory· Published Mar 5, 2021· Updated Jun 17, 2026
CVE-2021-27257
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.
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Affected products
45Patches
Vulnerability mechanics
References
2- kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-ExtendersnvdPatchVendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-264/nvdThird Party AdvisoryVDB Entry
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