Vulnerability Monitor

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CVE-2020-27867

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. When parsing the funjsq_access_token parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11653.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.8, indicating it requires adjacent network access with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 38 products from netgear, from netgear, from netgear and 35 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-02-12T00:15:12.970

Last Modified

2026-06-17T03:09:46.327

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.8 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:S/C:C/I:C/A:C

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: SINGLE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

5.1

Impact Score

10.0

Weaknesses
  • Type: Secondary
    CWE-77
  • Type: Primary
    CWE-77
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System netgear ac2100_firmware < 1.2.0.76 Yes
Hardware netgear ac2100 - No
Operating System netgear ac2400_firmware < 1.2.0.76 Yes
Hardware netgear ac2400 - No
Operating System netgear ac2600_firmware < 1.2.0.76 Yes
Hardware netgear ac2600 - No
Operating System netgear r6700_firmware < 1.2.0.76 Yes
Hardware netgear r6700 v2 No
Operating System netgear r6800_firmware < 1.2.0.76 Yes
Hardware netgear r6800 - No
Operating System netgear r6900_firmware < 1.2.0.76 Yes
Hardware netgear r6900 v2 No
Operating System netgear r7200_firmware < 1.2.0.76 Yes
Hardware netgear r7200 - No
Operating System netgear r7350_firmware < 1.2.0.76 Yes
Hardware netgear r7350 - No
Operating System netgear r7400_firmware < 1.2.0.76 Yes
Hardware netgear r7400 - No
Operating System netgear r7450_firmware < 1.2.0.76 Yes
Hardware netgear r7450 - No
Operating System netgear r6220_firmware < 1.1.0.104 Yes
Hardware netgear r6220 - No
Operating System netgear r6230_firmware < 1.1.0.104 Yes
Hardware netgear r6230 - No
Operating System netgear r6260_firmware < 1.1.0.78 Yes
Hardware netgear r6260 - No
Operating System netgear r6330_firmware < 1.1.0.78 Yes
Hardware netgear r6330 - No
Operating System netgear r6350_firmware < 1.1.0.78 Yes
Hardware netgear r6350 - No
Operating System netgear r6850_firmware < 1.1.0.78 Yes
Hardware netgear r6850 - No
Operating System netgear r6120_firmware < 1.0.0.76 Yes
Hardware netgear r6120 - No
Operating System netgear r6020_firmware < 1.0.0.48 Yes
Hardware netgear r6020 - No
Operating System netgear r6080_firmware < 1.0.0.48 Yes
Hardware netgear r6080 - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For netgear's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.