Remote Code Execution Vulnerability in NETGEAR R7800 Firmware
CVE-2021-27252

8.8HIGH

Key Information:

Vendor

Netgear
Status
R7800
Vendor
CVE Published:
14 April 2021

What is CVE-2021-27252?

This vulnerability enables network-adjacent attackers to execute arbitrary code on NETGEAR R7800 devices running firmware version 1.0.2.76. The flaw arises due to inadequate validation of user-supplied input during the handling of vendor-specific DHCP opcodes. As a result, attackers can potentially exploit this issue to execute commands in the context of the root user, compromising the integrity of the affected systems without requiring authentication.

Affected Version(s)

R7800 firmware version 1.0.2.76

References

https://kb.netgear.com/000062883/Security-Advisory-for-Mu...
x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-21-248/
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

atdog (@atdog_tw)
.