CVE-2021-20843 is a cross-site script inclusion vulnerability affecting the Web GUI of several Yamaha and NTT-West router and NVR models, including RTX830, NVR510, NVR700W, and RTX1210. This medium-severity vulnerability (CVSS 5.4) allows a remote, authenticated attacker to alter device settings by tricking a user into visiting a specially crafted web page. While requiring user interaction and authentication, successful exploitation could lead to unauthorized configuration changes. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 15.02.17CPE matchmatch criteria | cpe:2.3:o:yamaha:rtx830_firmware:*:*:*:*:*:*:*:* | ||
<= 15.01.18CPE matchmatch criteria | cpe:2.3:o:yamaha:nvr510_firmware:*:*:*:*:*:*:*:* | ||
<= 15.00.19CPE matchmatch criteria | cpe:2.3:o:yamaha:nvr700w_firmware:*:*:*:*:*:*:*:* | ||
<= 14.01.38CPE matchmatch criteria | cpe:2.3:o:yamaha:rtx1210_firmware:*:*:*:*:*:*:*:* | ||
<= 15.02.17CPE matchmatch criteria | cpe:2.3:o:ntt-west:biz_box_rtx830_firmware:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.