Vulnerability Database

289,697

Total vulnerabilities in the database

CVE-2021-27256

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. 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-12355.

  • Published: Mar 5, 2021
  • Updated: Apr 14, 2023
  • CVE: CVE-2021-27256
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.8
  • AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 8.3
  • AV:A/AC:L/Au:N/C:C/I:C/A:C

CWEs:

OWASP TOP 10:

Software From Fixed in
netgear / br200_firmware - 5.10.0.5
netgear / br500_firmware - 5.10.0.5
netgear / d7800_firmware - 1.0.1.60
netgear / ex6100v2_firmware - 1.0.1.98
netgear / ex6150v2_firmware - 1.0.1.98
netgear / ex6250_firmware - 1.0.0.134
netgear / ex6400_firmware - 1.0.2.158
netgear / ex6400v2_firmware - 1.0.0.134
netgear / ex6410_firmware - 1.0.0.134
netgear / ex6420_firmware - 1.0.0.134
netgear / ex7300_firmware - 1.0.2.158
netgear / ex7300v2_firmware - 1.0.0.134
netgear / ex7320_firmware - 1.0.0.134
netgear / ex7700_firmware - 1.0.0.216
netgear / ex8000_firmware - 1.0.1.232
netgear / lbr20_firmware - 2.6.3.50
netgear / r7800_firmware - 1.0.2.80
netgear / r8900_firmware - 1.0.5.28
netgear / r9000_firmware - 1.0.5.28
netgear / rbk12_firmware - 2.7.2.104
netgear / rbk13_firmware - 2.7.2.104
netgear / rbk14_firmware - 2.7.2.104
netgear / rbk15_firmware - 2.7.2.104
netgear / rbk20_firmware - 2.6.2.104
netgear / rbk23_firmware - 2.7.2.104
netgear / rbk40_firmware - 2.6.2.104
netgear / rbk43_firmware - 2.6.2.104
netgear / rbk43s_firmware - 2.6.2.104
netgear / rbk44_firmware - 2.6.2.104
netgear / rbk50_firmware - 2.7.2.104
netgear / rbk53_firmware - 2.7.2.104
netgear / rbr10_firmware - 2.6.2.104
netgear / rbr20_firmware - 2.6.2.104
netgear / rbr40_firmware - 2.6.2.104
netgear / rbr50_firmware - 2.7.2.104
netgear / rbs10_firmware - 2.6.2.104
netgear / rbs20_firmware - 2.6.2.104
netgear / rbs40_firmware - 2.6.2.104
netgear / rbs50_firmware - 2.7.2.104
netgear / rbs50y_firmware - 2.6.2.104
netgear / xr450_firmware - 2.3.2.114
netgear / xr500_firmware - 2.3.2.114
netgear / xr700_firmware - 1.0.1.38