D6220 Firmware
CVE-2021-27239
HIGH
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
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. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified under CWE-121. 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. Affected products include: Netgear D6220 Firmware, Netgear D6400 Firmware, Netgear D7000 Firmware, Netgear D8500 Firmware, Netgear Dc112A Firmware. Version information: version 1.0.4.98.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
More in D6220 Firmware
View allNetgear D6220 with Firmware Version 1.0.0.80, D8500 with Firmware Version 1.0.3.60, R6700 with Firmware Version 1.0.2.26
Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. Rated critical sev
Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. Rated critical severity (CVSS
Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. Rated critical severity (CVSS 9.8),
Certain NETGEAR devices are affected by lack of access control at the function level. Rated critical severity (CVSS 9.8)
Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker. Rated critical severity (CVSS
Certain NETGEAR devices are affected by incorrect configuration of security settings. Rated critical severity (CVSS 9.4)
Certain NETGEAR devices are affected by incorrect configuration of security settings. Rated high severity (CVSS 8.8), th
NETGEAR D6220 devices before 1.0.0.76 are affected by command injection by an authenticated user. Rated high severity (C
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R640
Certain NETGEAR devices are affected by command injection by an authenticated user. Rated high severity (CVSS 8.8), this
Certain NETGEAR devices are affected by incorrect configuration of security settings. Rated high severity (CVSS 7.2), th
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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