CVE-2021-20843 json
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.1…
published 2021-11-24 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8253
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- ntt-west biz_box_nvr510_firmware 15.01.18
Exploit prediction
0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
Affected products
- Yamaha Corporation RTX830, NVR510, NVR700W, RTX1210
Classification
- Weakness
-
- CWE-829 Inclusion of Functionality from Untrusted Control Sphere
References
-
ntt-west.co.jp
/smb/kiki_info/info/211109.html
mitigation, vendor-advisory
-
business.ntt-east.co.jp
/topics/2021/11_09.html
mitigation, vendor-advisory
-
rtpro.yamaha.co.jp
/RT/FAQ/Security/JVNVU91161784.html
mitigation, vendor-advisory
-
jvn.jp
/en/vu/JVNVU91161784/index.html
mitigation, third-party-advisory
Sources
- CVE List CVE-2021-20843
- NVD CVE-2021-20843
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