CVE-2021-34991
HIGHNETGEAR Multiple Router Firmware - Unauthenticated Stack-based Buffer Overflow via UPnP UUID Header
Title source: llmDescription
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400v2 1.0.4.106_10.0.80 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. When parsing the uuid request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-14110.
References (2)
Core 2
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-21-1303/
Vendor Advisory x_refsource_misc
https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168
Scores
CVSS v3
8.8
EPSS
0.0030
EPSS Percentile
53.0%
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
CWE-787
Status
published
Products (44)
netgear/cax80_firmware
< 2.1.3.5
netgear/d6220_firmware
< 1.0.0.76
netgear/d6400_firmware
< 1.0.0.108
netgear/d7000v2_firmware
< 1.0.0.76
netgear/dc112a_firmware
< 1.0.0.62
netgear/dgn2200v4_firmware
< 1.0.0.126
netgear/ex3700_firmware
< 1.0.0.94
netgear/ex3800_firmware
< 1.0.0.94
netgear/ex6120_firmware
< 1.0.0.66
netgear/ex6130_firmware
< 1.0.0.66
... and 34 more
Published
Nov 15, 2021
Tracked Since
Feb 18, 2026