CVE-2021-27252
Estado: ModificadaAlta (8.8)—
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the vendor_specific DHCP opcode. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12216.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 1.12%
- Percentil entre todas las CVEs puntuadas: 65
- Fecha de la puntuación: 4/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (43)
Netgear — Br200 FirmwareNetgear — Br500 FirmwareNetgear — D7800 FirmwareNetgear — Ex6100v2 FirmwareNetgear — Ex6150 FirmwareNetgear — Ex6250 FirmwareNetgear — Ex6400 FirmwareNetgear — Ex6400v2 FirmwareNetgear — Ex6410 FirmwareNetgear — Ex6420 FirmwareNetgear — Ex7300 FirmwareNetgear — Ex7300v2 FirmwareNetgear — Ex7320 FirmwareNetgear — Ex7700 FirmwareNetgear — Ex8000 FirmwareNetgear — Lbr20 FirmwareNetgear — R7800 FirmwareNetgear — R8900 FirmwareNetgear — R9000 FirmwareNetgear — Rbk12 FirmwareNetgear — Rbk13 FirmwareNetgear — Rbk14 FirmwareNetgear — Rbk15 FirmwareNetgear — Rbk20 FirmwareNetgear — Rbk23 FirmwareNetgear — Rbk40 FirmwareNetgear — Rbk43 FirmwareNetgear — Rbk43s FirmwareNetgear — Rbk44 FirmwareNetgear — Rbk50 FirmwareNetgear — Rbk53 FirmwareNetgear — Rbr10 FirmwareNetgear — Rbr20 FirmwareNetgear — Rbr40 FirmwareNetgear — Rbr50 FirmwareNetgear — Rbs10 FirmwareNetgear — Rbs20 FirmwareNetgear — Rbs40 FirmwareNetgear — Rbs50 FirmwareNetgear — Rbs50y FirmwareNetgear — Xr450 FirmwareNetgear — Xr500 FirmwareNetgear — Xr700 Firmware
CWE
- CWE-78
Referencias
- https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders
- https://www.zerodayinitiative.com/advisories/ZDI-21-248/
- https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders
- https://www.zerodayinitiative.com/advisories/ZDI-21-248/
JSON original (NVD)
Mostrar
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