What is CVE-2021-27251?

CVE-2021-27251 is a high-severity vulnerability in Netgear Br200, classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.8/10. Published 2021-04-14.

How severe is CVE-2021-27251?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-27251 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Netgear Br200

CVE-2021-27251

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.

EPSS: 0.007 (50.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

Public proof-of-concept exploits

rdomanski/Exploits_

References

zdi-disclosures@trendmicro.com (Patch, x_refsource_MISC, Vendor Advisory)
zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27251?: CVE-2021-27251 is a high-severity vulnerability in Netgear Br200, classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.8/10. Published 2021-04-14.
How severe is CVE-2021-27251?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-27251 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.