CVE-2021-27256

CWE-78 — OS Command Injection3 documents3 sources

Severity

8.8HIGH

EPSS

0.6%

top 31.84%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Netgear Br200 Firmware Netgear Br500 Firmware Netgear D7800 Firmware +41 more

Timeline

PublishedMar 5

Latest updateMay 24

Description

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 atta…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages44 packages

▶NVDnetgear/r7800_firmware< 1.0.2.80

▶NVDnetgear/br200_firmware< 5.10.0.5

▶NVDnetgear/br500_firmware< 5.10.0.5

▶NVDnetgear/d7800_firmware< 1.0.1.60

▶NVDnetgear/lbr20_firmware< 2.6.3.50

Patches

Patch: kb.netgear.com ↗Patch: kb.netgear.com ↗

🔴Vulnerability Details

GHSA

GHSA-7j9h-j7vq-452x: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1↗2022-05-24

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CVEList

CVE-2021-27256: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1↗2021-03-05

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