Medium severity5.7NVD Advisory· Published Nov 24, 2021· Updated Jun 17, 2026
CVE-2021-20844
CVE-2021-20844
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
13- cpe:2.3:o:ntt-west:biz_box_nvr510_firmware:*:*:*:*:*:*:*:*Range: <15.01.18
- cpe:2.3:o:ntt-west:biz_box_nvr700w_firmware:*:*:*:*:*:*:*:*Range: <=15.00.19
- cpe:2.3:o:ntt-west:biz_box_rtx1210_firmware:*:*:*:*:*:*:*:*Range: <=14.01.38
- cpe:2.3:o:ntt-west:biz_box_rtx830_firmware:*:*:*:*:*:*:*:*Range: <=15.02.17
- Yamaha Corporation/RTX830, NVR510, NVR700W, RTX1210v5Range: RTX830 Rev.15.02.17 and earlier, NVR510 Rev.15.01.18 and earlier, NVR700W Rev.15.00.19 and earlier, RTX1210 Rev.14.01.38 and earlier
Patches
Vulnerability mechanics
References
4- www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVNVU91161784.htmlnvdMitigationVendor Advisory
- business.ntt-east.co.jp/topics/2021/11_09.htmlnvdMitigationVendor Advisory
- jvn.jp/en/vu/JVNVU91161784/index.htmlnvdMitigationThird Party Advisory
- www.ntt-west.co.jp/smb/kiki_info/info/211109.htmlnvdMitigationVendor Advisory
News mentions
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