CVE-2021-20844 is an improper neutralization of HTTP request headers vulnerability affecting the Web GUI of specific Yamaha RTX and NVR series devices. A remote, authenticated attacker can exploit this flaw by tricking a user into visiting a specially crafted web page, leading to the disclosure of sensitive information. With a CVSS score of 5.7 (Medium), this vulnerability requires user interaction and authenticated access, but can result in high confidentiality impact. There is currently no public exploit code available, it is not listed in CISA's KEV catalog, and it has received minimal community discussion or media coverage, suggesting low active exploitation.
| 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:U/C:H/I:N/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.