What is the CVSS score of CVE-2021-27251?

CVE-2021-27251 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.7%.

Is there a patch available for CVE-2021-27251?

Yes, a patch is available for CVE-2021-27251. Update the affected software to the latest version immediately.

Ex6150 Firmware CVE-2021-27251

HIGH

Cleartext Transmission of Sensitive Information (CWE-319)

2021-04-14 zdi-disclosures@trendmicro.com

RCE Netgear Ex6150 Firmware R8900 Firmware R9000 Firmware Rbr20 Firmware Rbs20 Firmware Ex8000 Firmware D7800 Firmware R7800 Firmware Xr500 Firmware Xr700 Firmware Rbk20 Firmware Rbr40 Firmware Rbs40 Firmware Rbk40 Firmware Rbr50 Firmware Rbs50 Firmware Rbk50 Firmware Ex6400 Firmware Ex7300 Firmware Xr450 Firmware Rbs50Y Firmware Ex7700 Firmware Rbk12 Firmware Rbr10 Firmware Rbs10 Firmware Ex6100V2 Firmware Ex6250 Firmware Ex6400V2 Firmware Ex6410 Firmware Ex7300V2 Firmware Ex7320 Firmware Rbk13 Firmware Rbk14 Firmware Rbk15 Firmware Br200 Firmware Br500 Firmware Ex6420 Firmware Lbr20 Firmware Rbk23 Firmware Rbk43 Firmware Rbk43S Firmware Rbk44 Firmware Rbk53 Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Apr 14, 2021 - 16:15 nvd

HIGH 8.8

DescriptionNVD

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Authentication is not required to exploit this vulnerability The specific flaw exists within handling of firmware updates. The issue results from a fallback to a insecure protocol to deliver updates. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12308.

AnalysisAI

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Rated high severity (CVSS 8.8), this vulnerability is no authentication required, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-319. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Authentication is not required to exploit this vulnerability The specific flaw exists within handling of firmware updates. The issue results from a fallback to a insecure protocol to deliver updates. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12308. Affected products include: Netgear Br200 Firmware, Netgear Br500 Firmware, Netgear D7800 Firmware, Netgear Ex6100V2 Firmware, Netgear Ex6150 Firmware.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.