Vulnerability Details : CVE-2021-20844
Improper neutralization of HTTP request headers for scripting syntax vulnerability in the Web GUI of RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, and RTX1210 Rev.14.01.38 and earlier allows a remote authenticated attacker to obtain sensitive information via a specially crafted web page.
Products affected by CVE-2021-20844
- cpe:2.3:o:yamaha:rtx830_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:yamaha:nvr510_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:yamaha:nvr700w_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:yamaha:rtx1210_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ntt-west:biz_box_rtx830_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ntt-west:biz_box_nvr510_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ntt-west:biz_box_nvr700w_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:ntt-west:biz_box_rtx1210_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20844
0.34%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20844
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
3.5
|
LOW | AV:N/AC:M/Au:S/C:P/I:N/A:N |
6.8
|
2.9
|
NIST | |
5.7
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
2.1
|
3.6
|
NIST |
CWE ids for CVE-2021-20844
-
The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-20844
-
https://jvn.jp/en/vu/JVNVU91161784/index.html
JVNVU#91161784: Multiple vulnerabilities in multiple Yamaha routersMitigation;Third Party Advisory
-
https://business.ntt-east.co.jp/topics/2021/11_09.html
ヤマハルータをご利用のお客さまへ|お知らせ|法人のお客さま| NTT東日本Mitigation;Vendor Advisory
-
https://www.ntt-west.co.jp/smb/kiki_info/info/211109.html
【NTT西日本】Biz Boxルータをご利用のお客さまへ - 法人・企業向けICTサービスMitigation;Vendor Advisory
-
http://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVNVU91161784.html
FAQ for YAMAHA RT Series / SecurityMitigation;Vendor Advisory
Jump to