Vulnerability Monitor

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CVE-2020-27861


This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 71 products from netgear, from netgear, from netgear and 68 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

2021-02-12T00:15:12.500

Last Modified

2024-11-21T05:21:57.107

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

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

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

6.5

Impact Score

10.0

Weaknesses
  • Type: Secondary
    CWE-78
  • Type: Primary
    CWE-78

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System netgear cbk40_firmware < 2.6.1.38 Yes
Hardware netgear cbk40 - No
Operating System netgear cbk43_firmware < 2.6.1.38 Yes
Hardware netgear cbk43 - No
Operating System netgear cbr40_firmware < 2.6.1.38 Yes
Hardware netgear cbr40 - No
Operating System netgear ex6200_firmware < 1.0.1.82 Yes
Hardware netgear ex6200 v2 No
Operating System netgear ex7700_firmware < 1.0.0.210 Yes
Hardware netgear ex7700 - No
Operating System netgear ex8000_firmware < 1.0.1.224 Yes
Hardware netgear ex8000 - No
Operating System netgear rbk12_firmware < 2.6.1.44 Yes
Hardware netgear rbk12 - No
Operating System netgear rbk13_firmware < 2.6.1.44 Yes
Hardware netgear rbk13 - No
Operating System netgear rbk14_firmware < 2.6.1.44 Yes
Hardware netgear rbk14 - No
Operating System netgear rbk15_firmware < 2.6.1.44 Yes
Hardware netgear rbk15 - No
Operating System netgear rbr10_firmware < 2.6.1.44 Yes
Hardware netgear rbr10 - No
Operating System netgear rbs10_firmware < 2.6.1.44 Yes
Hardware netgear rbs10 - No
Operating System netgear rbk20w_firmware < 2.6.1.36 Yes
Hardware netgear rbk20w - No
Operating System netgear rbk23w_firmware < 2.6.1.36 Yes
Hardware netgear rbk23w - No
Operating System netgear rbk20_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk20_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk20 - No
Operating System netgear rbk22_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk22_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk22 - No
Operating System netgear rbk23_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk23_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk23 - No
Operating System netgear rbr20_firmware < 2.6.1.36 Yes
Hardware netgear rbr20 - No
Operating System netgear rbs20_firmware < 2.6.1.38 Yes
Hardware netgear rbs20 - No
Operating System netgear rbk30_firmware < 2.6.1.36 Yes
Hardware netgear rbk30 - No
Operating System netgear rbk33_firmware < 2.6.1.36 Yes
Hardware netgear rbk33 - No
Operating System netgear rbk40_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk40_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk40 - No
Operating System netgear rbk43_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk43_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk43 - No
Operating System netgear rbk43s_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk43s_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk43s - No
Operating System netgear rbk44_router_firmware < 2.6.1.36 Yes
Operating System netgear rbk44_satellite_firmware < 2.6.1.38 Yes
Hardware netgear rbk44 - No
Operating System netgear rbr40_firmware < 2.6.1.36 Yes
Hardware netgear rbr40 - No
Operating System netgear rbs40_firmware < 2.6.1.38 Yes
Hardware netgear rbs40 - No
Operating System netgear rbk50_firmware < 2.6.1.40 Yes
Hardware netgear rbk50 - No
Operating System netgear rbk50v_firmware < 2.6.1.40 Yes
Hardware netgear rbk50v - No
Operating System netgear rbk52w_firmware < 2.6.1.40 Yes
Hardware netgear rbk52w - No
Operating System netgear rbr50_firmware < 2.6.1.40 Yes
Hardware netgear rbr50 - No
Operating System netgear rbs50_firmware < 2.6.1.40 Yes
Hardware netgear rbs50 - 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.