CVE-2021-27255 - CVE House

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Status published Medium CVE-2021-27255

This vulnerability allows remote attackers to execute arbitrary code on...

6.3 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

STARLabs

References

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Affected Vendor

NETGEAR

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Affected Software

R7800

Vulnerable Versions:

firmware version 1.0.2.76

Timeline

Official Publish: March 5th, 2021

Last Modified: August 3rd, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1078 Valid Accounts

T1136 Create Account

T1098 Account Manipulation

Privilege Escalation

T1021 Remote Services

Lateral Movement