Medium severity · published Nov 24, 2021
CVE-2021-20843
Cross-site script inclusion 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…
5.4
CVSS
0.7%
EPSS
No
On KEV
Description
Cross-site script inclusion 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 alter the settings of the product via a specially crafted web page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RN
RTX830, NVR510, NVR700W, RTX1210 · Yamaha Corporation
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 · source: vendor
BB
Biz Box Nvr510 Firmware · Ntt-west
before 15.01.18 · source: NVD
BB
Biz Box Nvr700w Firmware · Ntt-west
through 15.00.19 · source: NVD
BB
Biz Box Rtx1210 Firmware · Ntt-west
through 14.01.38 · source: NVD
BB
Biz Box Rtx830 Firmware · Ntt-west
through 15.02.17 · source: NVD
NF
Nvr510 Firmware · Yamaha
through 15.01.18 · source: NVD
NF
Nvr700w Firmware · Yamaha
through 15.00.19 · source: NVD
RF
Rtx1210 Firmware · Yamaha
through 14.01.38 · source: NVD
RF
Rtx830 Firmware · Yamaha
through 15.02.17 · source: NVD
Affected product
RN
RTX830, NVR510, NVR700W, RTX1210
Yamaha Corporation
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20843
Mitigation
http://www.rtpro.yamaha.co.jp/RT/FAQ/Security/JVNVU91161784.html
Mitigation
https://business.ntt-east.co.jp/topics/2021/11_09.html
Mitigation
https://jvn.jp/en/vu/JVNVU91161784/index.html
Mitigation
https://www.ntt-west.co.jp/smb/kiki_info/info/211109.html
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