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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.
8.8
CVSS
6.8
ShadowTrackr
NO
CISA KEV
-
NCSC.nl
CVSS v4.0 Metrics
Exploitability
Attack VectorAdjacent
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusUnavailable

Change Log
DateSourceChangesScore
2026-07-17PoCE: U→P5.2 → 6.8
2026-07-15cve.orginitial5.2
References: CVE.org · NVD · PoC

Affected Software
VendorProductVersion
netgearcbk40_firmware< 2.6.1.38
netgearcbk43_firmware< 2.6.1.38
netgearcbr40_firmware< 2.6.1.38
netgearex6200_firmware< 1.0.1.82
netgearex7700_firmware< 1.0.0.210
netgearex8000_firmware< 1.0.1.224
NETGEAROrbi2.5.1.16
netgearrbk12_firmware< 2.6.1.44
netgearrbk13_firmware< 2.6.1.44
netgearrbk14_firmware< 2.6.1.44
netgearrbk15_firmware< 2.6.1.44
netgearrbk20_router_firmware< 2.6.1.36
netgearrbk20_satellite_firmware< 2.6.1.38
netgearrbk20w_firmware< 2.6.1.36
netgearrbk22_router_firmware< 2.6.1.36
netgearrbk22_satellite_firmware< 2.6.1.38
netgearrbk23_router_firmware< 2.6.1.36
netgearrbk23_satellite_firmware< 2.6.1.38
netgearrbk23w_firmware< 2.6.1.36
netgearrbk30_firmware< 2.6.1.36
netgearrbk33_firmware< 2.6.1.36
netgearrbk40_router_firmware< 2.6.1.36
netgearrbk40_satellite_firmware< 2.6.1.38
netgearrbk43_router_firmware< 2.6.1.36
netgearrbk43_satellite_firmware< 2.6.1.38
netgearrbk43s_router_firmware< 2.6.1.36
netgearrbk43s_satellite_firmware< 2.6.1.38
netgearrbk44_router_firmware< 2.6.1.36
netgearrbk44_satellite_firmware< 2.6.1.38
netgearrbk50_firmware< 2.6.1.40
netgearrbk50v_firmware< 2.6.1.40
netgearrbk52w_firmware< 2.6.1.40
netgearrbr10_firmware< 2.6.1.44
netgearrbr20_firmware< 2.6.1.36
netgearrbr40_firmware< 2.6.1.36
netgearrbr50_firmware< 2.6.1.40
netgearrbs10_firmware< 2.6.1.44
netgearrbs20_firmware< 2.6.1.38
netgearrbs40_firmware< 2.6.1.38
netgearrbs50_firmware< 2.6.1.40
Published: 2021-02-11