CVE-2021-20716 describes a critical vulnerability in numerous Buffalo network devices, including various BHR, FS, WBR, WHR, WLA, WLI, WVR, and WZR series firmware versions prior to their respective patches. This hidden functionality allows a remote, unauthenticated attacker to enable a debug option, leading to arbitrary code execution, OS command execution, configuration changes, and denial-of-service conditions. With a CVSS score of 9.8 (Critical), the vulnerability is easily exploitable over the network with no user interaction or privileges required, posing a significant risk of complete compromise. While not listed on CISA KEV and lacking public exploit intelligence or widespread community discussion, the high FAUCET Risk Score indicates its potential severity.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.55CPE matchmatch criteria | cpe:2.3:o:buffalo:bhr-4rv_firmware:*:*:*:*:*:*:*:* | ||
<= 2.04CPE matchmatch criteria | cpe:2.3:o:buffalo:fs-g54_firmware:*:*:*:*:*:*:*:* | ||
<= 2.32CPE matchmatch criteria | cpe:2.3:o:buffalo:wbr2-b11_firmware:*:*:*:*:*:*:*:* | ||
<= 2.32CPE matchmatch criteria | cpe:2.3:o:buffalo:wbr2-g54_firmware:*:*:*:*:*:*:*:* | ||
<= 2.32CPE matchmatch criteria | cpe:2.3:o:buffalo:wbr2-g54-kd_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/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, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.