Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.
References (2)
Core 2
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-21-206/
Scores
CVSS v3
8.8
EPSS
0.0259
EPSS Percentile
85.8%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-121
Status
published
Products (35)
netgear/d6220_firmware
< 1.0.0.68
netgear/d6400_firmware
< 1.0.0.102
netgear/d7000_firmware
< 1.0.0.66
netgear/d8500_firmware
< 1.0.3.60
netgear/dc112a_firmware
< 1.0.0.54
netgear/ex7000_firmware
< 1.0.1.94
netgear/ex7500_firmware
< 1.0.0.72
netgear/r6250_firmware
< 1.0.4.48
netgear/r6300_firmware
< 1.0.4.50
netgear/r6400_firmware
< 1.0.1.68
... and 25 more
Published
Mar 29, 2021
Tracked Since
Feb 18, 2026