CVE-2021-27251 is a critical vulnerability affecting NETGEAR Nighthawk R7800 routers, allowing network-adjacent attackers to execute arbitrary code with root privileges. This flaw stems from the device's fallback to an insecure protocol for firmware updates, requiring no authentication for exploitation. With a CVSS score of 8.8 (High), it poses a significant risk due to its low attack complexity and complete compromise potential (Confidentiality, Integrity, Availability). While no public exploit code or active exploitation has been observed, and community discussion is minimal, the inherent risk remains high.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.10.0.5CPE matchmatch criteria | cpe:2.3:o:netgear:br200_firmware:*:*:*:*:*:*:*:* | ||
< 5.10.0.5CPE matchmatch criteria | cpe:2.3:o:netgear:br500_firmware:*:*:*:*:*:*:*:* | ||
< 1.0.1.60CPE matchmatch criteria | cpe:2.3:o:netgear:d7800_firmware:*:*:*:*:*:*:*:* | ||
< 1.0.1.98CPE matchmatch criteria | cpe:2.3:o:netgear:ex6100v2_firmware:*:*:*:*:*:*:*:* | ||
< 1.0.1.98CPE matchmatch criteria | cpe:2.3:o:netgear:ex6150_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.